113 is the natural number following 112 and preceding 114.

Cardinal	one hundred * thirteen
Ordinal	113th
Factorization	prime
Roman numeral	CXIII
Binary	1110001
Hexadecimal	71

In mathematics

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One hundred ^* thirteen is the 30th prime number, following 109 and preceding 127, a Sophie Germain prime, a Chen prime, a primeval number, and a permutable prime with 131 and 311. 113 is an Eisenstein prime with no imaginary part and real part of the form $3n\; -\; 1$.

It is a highly cototient number and a centered square number. 355/113 approximates pi to seven decimal places, with an error of less than 1/113³.

In other fields

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• The year AD 113 or 113 BC.

• The atomic number of an element temporarily called ununtrium.
• The number of surat al-Falaq in the Qur'an.
• The emergency telephone number in Italy.
• Part of an in-joke on some Disney movies. See A113.
• The French hip hop group 113.

Integers

113 (nombre) | 113 | 113 (getal) | 113 | 113 (число) | 113 (število) | 113 (tal)