| 词条 | 179 (number) |
| 释义 |
| factorization = prime | prime = 41st | divisor = 1, 179 }} 179 (one hundred [and] seventy-nine) is the natural number following 178 and preceding 180. In mathematics179 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).[1] 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
External links{{Commons category|179 (number)}}
References1. ^{{Cite web|url=https://oeis.org/A059455|title=Sloane's A059455 : Safe primes which are also Sophie Germain primes|last=|first=|date=|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-05-28}} {{Integers|1}}{{DEFAULTSORT:179 (Number)}} 1 : Integers |
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