179 (number)

← 178 179 180 →
← 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 seventy-nine
Ordinal	179th (one hundred and seventy-ninth)
Factorization	prime
Prime	41st
Divisors	1, 179
Roman numeral	CLXXIX
Binary	101100112
Ternary	201223
Quaternary	23034
Quinary	12045
Senary	4556
Octal	2638
Duodecimal	12B12
Hexadecimal	B316
Vigesimal	8J20
Base 36	4Z36

179 (one hundred [and] seventy-nine) is the natural number following 178 and preceding 180.

In mathematics

179 is an odd number.

179 is a prime number; that is, it is not divisible by integer (except for 1 and itself). It is an Eisenstein prime, as it is indivisible even by complex Gaussian integers. It is a Chen prime, being two less than another prime, 181. It is a full reptend prime, meaning 1/179 has a decimal expansion of a repeated sequence of 178 digits.

179 is a safe prime, as it is one more than two times the prime 89. It is also a Sophie Germain prime, as the prime 359 is one more than two times 179. It is only the fifth number with both of these properties (after 5, 11, 23, and 83).

179 is a strictly non-palindromic number. It is not a palindromic number in any base.

179 (of 365) days of the year are even numbered.

See also

• AD 179 and 179 BC
• List of highways numbered 179

External links

• Number Facts and Trivia: 179
• The Number 179
• The Positive Integer 179
• Prime curiosities: 179
• Number Gossip: 179