117 (number)

117 (one hundred [and] seventeen) is the natural number following 116 and preceding 118.

← 116 118 → 117
← 110 111 112 113 114 115 116 117 118 119 → List of numbers — Integers ← 100 110 120 130 140 150 160 170 180 190 →
Cardinal	one hundred [and] seventeen
Ordinal	117th (one hundred [and] seventeenth)
Numeral system	114
Factorization	$3^2 \cdot 13$
Divisors	1, 3, 9, 13, 39, 117
Roman numeral	CXVII
Binary	11101012
Octal	1658
Duodecimal	9912
Hexadecimal	7516

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

• List of highways numbered 117
• National longevity recordholders
• Oldest people

References

1. ^ Ivars Peterson, "Perfect Pyramids" MAA Online July 28, 2003
2. ^ Weisstein, Eric W. "Heronian Tetrahedron." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/HeronianTetrahedron.html

External links

• Teamsters Local 117