170 (number)

← 169 170 171 →
← 170 171 172 173 174 175 176 177 178 179 → List of numbers Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	one hundred [and] seventy
Ordinal	th
Factorization	$2\cdot 5\cdot 17$
Divisors	1, 2, 5, 10, 17, 34, 85, 170
Greek numeral	ΡΟ´
Roman numeral	CLXX
Binary	101010102
Ternary	200223
Senary	4426
Octal	2528
Duodecimal	12212
Hexadecimal	AA16

170 (one hundred [and] seventy) is the natural number following 169 and preceding 171.

In mathematics

170 is the smallest n for which φ(n) and σ(n) are both square(64 and 324 respectively). But 170 is never a solution for φ(x), making it a nontotient. Nor is it ever a solution to x - φ(x), making it a noncototient.

170 is a repdigit in base 4 (2222) and base 16 (AA), as well as in bases 33, 84, and 169. It is also a sphenic number.

170 is the largest integer for which Google's built-in calculator function can compute the factorial, returning the answer as 170! = 7.25741562 × 10³⁰⁶.

In sports

• 170 is the maximum check-out possible in a standard game of darts (where the final score must be a double). It consists of two treble-twenties and a double-bullseye.

See also

• 170s
• E170 (disambiguation)
• F170 (disambiguation)
• List of highways numbered 170
• United States Supreme Court cases, Volume 170
• United Nations Security Council Resolution 170
• Pennsylvania House of Representatives, District 170
• 170th meridian west and 170th meridian east

External links

• The Number 170
• Number Facts and Trivia: 170
• The Positive Integer 170
• Prime curiosities: 170
• Plumbers and Pipefitters Union 170, Vancouver, BC
• Teamsters Local 170, Worcester, MA
• West Virginia Public Workers Union Local 170