113 (number)

Template: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,<ref>{{#invoke:citation/CS1|citation

|CitationClass=web }}</ref> an emirp, an isolated prime, a Chen prime<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> 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<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> and a permutable prime with 131 and 311.

• 113 is a highly cototient number<ref>{{#invoke:citation/CS1|citation

|CitationClass=web }}</ref> and a centered square number.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

• 113 is the denominator of 355/113, an accurate approximation to Template:Pi.

Other uses

• 113 is also the atomic number of nihonium.
• A113 is a Pixar recurring inside joke or Easter Egg, e.g.: (WALL-E) = (W-A113).
• 113 is the first full-sized Bluebird bus at Essex North Shore Agricultural and Technical High School

See also

• 113 (disambiguation)

References

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