Английская Википедия:113 (number)

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Шаблон:Infobox number 113 (one hundred [and] thirteen) is the natural number following 112 and preceding 114.

Mathematics

• 113 is the 30th prime number (following 109 and preceding 127), so it can only be divided by one and itself. 113 is a Sophie Germain prime, an emirp, an isolated prime, a Chen prime and a Proth prime as it is a prime number of the form <math>7\times 2^{4}+1.</math> 113 is also an Eisenstein prime with no imaginary part and real part of the form <math>3n - 1</math>. In decimal, this prime is a primeval number and a permutable prime with 131 and 311.
• 113 is a highly cototient number and a centered square number.
• 113 is the denominator of 355/113, an accurate approximation to Шаблон:Pi.

See also

• 113 (disambiguation)
• A113 is a Pixar recurring inside joke or Easter Egg, e.g.: (WALL-E) = (W-A113).

References

• Wells, D. The Penguin Dictionary of Curious and Interesting Numbers London: Penguin Group. (1987): 134