- 117 (number)
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117 (one hundred [and] seventeen) is the natural number following 116 and preceding 118.
117 Cardinal one hundred [and] seventeen Ordinal 117th
(one hundred [and] seventeenth)Numeral system 114 Factorization Divisors 1, 3, 9, 13, 39, 117 Roman numeral CXVII Binary 11101012 Octal 1658 Duodecimal 9912 Hexadecimal 7516 Contents
In mathematics
One hundred seventeen is the smallest possible length of the longest side of a Heronian tetrahedron (one whose sides are all rational numbers).[1][2]
117 is a pentagonal number.
In base 10, it is a Harshad number.
In other fields
One hundred seventeen is also:
- The atomic number of a recently discovered element temporarily called ununseptium
- A substitute for the number 17, which is considered unlucky in Italy. When Renault exported the R17 to Italy, it was renamed R117[citation needed]
- The number to call Guardia di Finanza for customs/financial/border police in Italy
- The fire emergency telephone number in Portugal
- 1-1-7 is the national emergency telephone number in the Philippines
- The police emergency telephone number in Switzerland
- The serial number of protagonist John from the Halo Series
See also
References
- ^ Ivars Peterson, "Perfect Pyramids" MAA Online July 28, 2003
- ^ Weisstein, Eric W. "Heronian Tetrahedron." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/HeronianTetrahedron.html
External links
Categories:- Integers
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