Table of Contents
50 relations: Armenian numerals, Balanced prime, Carmichael number, Centered heptagonal number, Centered octagonal number, Cuban prime, Cube (algebra), Decagonal number, Eight queens puzzle, Eight-thousander, Harmonic divisor number, Hexagonal number, Highly cototient number, Leyland number, Magic constant, Magic square, Mersenne prime, Mertens function, Narcissistic number, Natural number, Nonagonal number, Octahedral number, Perfect number, Perfect totient number, Polygonal number, Power of two, Prime number, Pyramidal number, Repdigit, Ruth–Aaron pair, Safe and Sophie Germain primes, Sexy prime, Smooth number, Square pyramidal number, Square root of 2, Super-Poulet number, Super-prime, Tetrahedral number, Triangular number, Twin prime, 13 (number), 1989 Tiananmen Square protests and massacre, 20 (number), 28 (number), 496 (number), 6, 666 (number), 7000 (number), 8128, 8192.
Armenian numerals
Armenian numerals form a historic numeral system created using the majuscules (uppercase letters) of the Armenian alphabet.
See 8000 (number) and Armenian numerals
Balanced prime
In number theory, a balanced prime is a prime number with equal-sized prime gaps above and below it, so that it is equal to the arithmetic mean of the nearest primes above and below.
See 8000 (number) and Balanced prime
Carmichael number
In number theory, a Carmichael number is a composite number which in modular arithmetic satisfies the congruence relation: for all integers.
See 8000 (number) and Carmichael number
Centered heptagonal number
A centered heptagonal number is a centered figurate number that represents a heptagon with a dot in the center and all other dots surrounding the center dot in successive heptagonal layers.
See 8000 (number) and Centered heptagonal number
Centered octagonal number
A centered octagonal number is a centered figurate number that represents an octagon with a dot in the center and all other dots surrounding the center dot in successive octagonal layers.
See 8000 (number) and Centered octagonal number
Cuban prime
A cuban prime is a prime number that is also a solution to one of two different specific equations involving differences between third powers of two integers x and y.
See 8000 (number) and Cuban prime
Cube (algebra)
In arithmetic and algebra, the cube of a number is its third power, that is, the result of multiplying three instances of together. 8000 (number) and cube (algebra) are integers.
See 8000 (number) and Cube (algebra)
Decagonal number
A decagonal number is a figurate number that extends the concept of triangular and square numbers to the decagon (a ten-sided polygon).
See 8000 (number) and Decagonal number
Eight queens puzzle
The eight queens puzzle is the problem of placing eight chess queens on an 8×8 chessboard so that no two queens threaten each other; thus, a solution requires that no two queens share the same row, column, or diagonal.
See 8000 (number) and Eight queens puzzle
Eight-thousander
The eight-thousanders are the 14 mountains recognised by the International Mountaineering and Climbing Federation (UIAA) as being more than in height above sea level, and sufficiently independent of neighbouring peaks.
See 8000 (number) and Eight-thousander
Harmonic divisor number
In mathematics, a harmonic divisor number or Ore number is a positive integer whose divisors have a harmonic mean that is an integer.
See 8000 (number) and Harmonic divisor number
Hexagonal number
Not to be confused with hexadecimal numbers. A hexagonal number is a figurate number.
See 8000 (number) and Hexagonal number
Highly cototient number
In number theory, a branch of mathematics, a highly cototient number is a positive integer k which is above 1 and has more solutions to the equation than any other integer below k and above 1.
See 8000 (number) and Highly cototient number
Leyland number
In number theory, a Leyland number is a number of the form where x and y are integers greater than 1.
See 8000 (number) and Leyland number
Magic constant
The magic constant or magic sum of a magic square is the sum of numbers in any row, column, or diagonal of the magic square.
See 8000 (number) and Magic constant
Magic square
In mathematics, especially historical and recreational mathematics, a square array of numbers, usually positive integers, is called a magic square if the sums of the numbers in each row, each column, and both main diagonals are the same.
See 8000 (number) and Magic square
Mersenne prime
In mathematics, a Mersenne prime is a prime number that is one less than a power of two.
See 8000 (number) and Mersenne prime
Mertens function
In number theory, the Mertens function is defined for all positive integers n as where \mu(k) is the Möbius function.
See 8000 (number) and Mertens function
Narcissistic number
In number theory, a narcissistic number by Scott Moore (also known as a pluperfect digital invariant (PPDI), an Armstrong number (after Michael F. Armstrong) or a plus perfect number) in a given number base b is a number that is the sum of its own digits each raised to the power of the number of digits.
See 8000 (number) and Narcissistic number
Natural number
In mathematics, the natural numbers are the numbers 0, 1, 2, 3, etc., possibly excluding 0. 8000 (number) and natural number are integers.
See 8000 (number) and Natural number
Nonagonal number
A nonagonal number, or an enneagonal number, is a figurate number that extends the concept of triangular and square numbers to the nonagon (a nine-sided polygon).
See 8000 (number) and Nonagonal number
Octahedral number
In number theory, an octahedral number is a figurate number that represents the number of spheres in an octahedron formed from close-packed spheres.
See 8000 (number) and Octahedral number
Perfect number
In number theory, a perfect number is a positive integer that is equal to the sum of its positive proper divisors, that is, divisors excluding the number itself.
See 8000 (number) and Perfect number
Perfect totient number
In number theory, a perfect totient number is an integer that is equal to the sum of its iterated totients.
See 8000 (number) and Perfect totient number
Polygonal number
In mathematics, a polygonal number is a number that counts dots arranged in the shape of a regular polygon.
See 8000 (number) and Polygonal number
Power of two
A power of two is a number of the form where is an integer, that is, the result of exponentiation with number two as the base and integer as the exponent. 8000 (number) and power of two are integers.
See 8000 (number) and Power of two
Prime number
A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbers.
See 8000 (number) and Prime number
Pyramidal number
A pyramidal number is the number of points in a pyramid with a polygonal base and triangular sides.
See 8000 (number) and Pyramidal number
Repdigit
In recreational mathematics, a repdigit or sometimes monodigit is a natural number composed of repeated instances of the same digit in a positional number system (often implicitly decimal).
See 8000 (number) and Repdigit
Ruth–Aaron pair
In mathematics, a Ruth–Aaron pair consists of two consecutive integers (e.g., 714 and 715) for which the sums of the prime factors of each integer are equal: and There are different variations in the definition, depending on how many times to count primes that appear multiple times in a factorization.
See 8000 (number) and Ruth–Aaron pair
Safe and Sophie Germain primes
In number theory, a prime number p is a Sophie Germain prime if 2p + 1 is also prime.
See 8000 (number) and Safe and Sophie Germain primes
Sexy prime
In number theory, sexy primes are prime numbers that differ from each other by.
See 8000 (number) and Sexy prime
Smooth number
In number theory, an n-smooth (or n-friable) number is an integer whose prime factors are all less than or equal to n. For example, a 7-smooth number is a number in which every prime factor is at most 7.
See 8000 (number) and Smooth number
Square pyramidal number
In mathematics, a pyramid number, or square pyramidal number, is a natural number that counts the stacked spheres in a pyramid with a square base.
See 8000 (number) and Square pyramidal number
Square root of 2
The square root of 2 (approximately 1.4142) is a real number that, when multiplied by itself or squared, equals the number 2.
See 8000 (number) and Square root of 2
Super-Poulet number
A super-Poulet number is a Poulet number, or pseudoprime to base 2, whose every divisor d divides For example, 341 is a super-Poulet number: it has positive divisors and we have: When \frac is not prime, then it and every divisor of it are a pseudoprime to base 2, and a super-Poulet number.
See 8000 (number) and Super-Poulet number
Super-prime
Super-prime numbers, also known as higher-order primes or prime-indexed primes (PIPs), are the subsequence of prime numbers that occupy prime-numbered positions within the sequence of all prime numbers.
See 8000 (number) and Super-prime
Tetrahedral number
A tetrahedral number, or triangular pyramidal number, is a figurate number that represents a pyramid with a triangular base and three sides, called a tetrahedron.
See 8000 (number) and Tetrahedral number
Triangular number
A triangular number or triangle number counts objects arranged in an equilateral triangle.
See 8000 (number) and Triangular number
Twin prime
A twin prime is a prime number that is either 2 less or 2 more than another prime number—for example, either member of the twin prime pair or In other words, a twin prime is a prime that has a prime gap of two.
See 8000 (number) and Twin prime
13 (number)
13 (thirteen) is the natural number following 12 and preceding 14. 8000 (number) and 13 (number) are integers.
See 8000 (number) and 13 (number)
1989 Tiananmen Square protests and massacre
The Tiananmen Square protests, known in China as the June Fourth Incident, were student-led demonstrations held in Tiananmen Square, Beijing, China, lasting from 15 April to 4 June 1989.
See 8000 (number) and 1989 Tiananmen Square protests and massacre
20 (number)
20 (twenty; Roman numeral XX) is the natural number following 19 and preceding 21. 8000 (number) and 20 (number) are integers.
See 8000 (number) and 20 (number)
28 (number)
28 (twenty-eight) is the natural number following 27 and preceding 29. 8000 (number) and 28 (number) are integers.
See 8000 (number) and 28 (number)
496 (number)
496 (four hundred ninety-six) is the natural number following 495 and preceding 497. 8000 (number) and 496 (number) are integers.
See 8000 (number) and 496 (number)
6
6 (six) is the natural number following 5 and preceding 7. 8000 (number) and 6 are integers.
666 (number)
666 (six hundred sixty-six) is the natural number following 665 and preceding 667. 8000 (number) and 666 (number) are integers.
See 8000 (number) and 666 (number)
7000 (number)
7000 (seven thousand) is the natural number following 6999 and preceding 7001. 8000 (number) and 7000 (number) are integers.
See 8000 (number) and 7000 (number)
8128
8128 is the integer following 8127 and preceding 8129. 8000 (number) and 8128 are integers.
8192
8192 is the natural number following 8191 and preceding 8193. 8000 (number) and 8192 are integers.
References
Also known as 8 000, 8,000, 8000-8999 (numbers), 8001 (number), 8100, 8700, 8900, 8964 (number), 8999 (number), Eight thousand.