- noncototient
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An integer that cannot be expressed as the difference between a positive integer and the number of coprime integers below it
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noncototient
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Noncototient — In mathematics, a noncototient is a positive integer n that cannot be expressed as the difference between a positive integer m and the number of coprime integers below it. That is, m − φ(m) = n, where φ stands for Euler s… … Wikipedia
300 (number) — This article is about the numbers 300 to 399. For other uses of 300, see 300 (disambiguation). For the guitar, see Gibson ES 335. For the British tilting train, see British Rail Class 390. For the Dada magazine, see 391 (magazine). For the… … Wikipedia
400 (number) — ← 399 401 → 400 List of numbers Integers ← 0 100 200 … Wikipedia
290 (number) — 290 is the natural number after 289 and before 291.In mathematicsThe product of three primes, 290 is a sphenic number, and the sum of four consecutive primes (67 + 71 + 73 + 79). The sum of the squares of the divisors of 17 is 290. If you… … Wikipedia
260 (number) — 260 (two hundred [and] sixty) is the magic constant of the n times; n normal magic square and n Queens Problem for n = 8, the size of an actual chess board.260 is also the magic constant of the Franklin magic square devised by Benjamin… … Wikipedia
Euler's totient function — For other functions named after Euler, see List of topics named after Leonhard Euler. The first thousand values of φ(n) In number theory, the totient φ(n) of a positive integer n is defined to be the number of positive integers less than or equal … Wikipedia
222 (number) — This article is about the number. For the year 222, see 222. For the pain medication known as 222, see Co codaprin. List of numbers Integers ← 0 100 200 300 400 500 600 700 800 900 → … Wikipedia
50 (number) — This article discusses the number fifty. For the year 50 CE, see 50. For other uses of 50, see 50 (disambiguation) ← 49 51 → 50 ← 50 … Wikipedia
List of number theory topics — This is a list of number theory topics, by Wikipedia page. See also List of recreational number theory topics Topics in cryptography Contents 1 Factors 2 Fractions 3 Modular arithmetic … Wikipedia
86 (number) — 86 (eighty six) is the natural number following 85 and preceding 87. ← 85 87 → 86 ← 80 … Wikipedia
