239 (number)
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|---|---|---|---|---|
| Cardinal | two hundred thirty-nine | |||
| Ordinal | 239th (two hundred and thirty-ninth) |
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| Factorization | 239 | |||
| Prime | yes | |||
| Roman numeral | CCXXXIX | |||
| Binary | 111011112 | |||
| Ternary | 222123 | |||
| Quaternary | 32334 | |||
| Quinary | 14245 | |||
| Senary | 10356 | |||
| Octal | 3578 | |||
| Duodecimal | 17B12 | |||
| Hexadecimal | EF16 | |||
| Vigesimal | BJ20 | |||
| Base 36 | 6N36 | |||
239 (two hundred [and] thirty-nine) is the natural number following 238 and preceding 240.
It is a prime number. The next is 241, with which it forms a pair of twin primes. 239 is a Sophie Germain prime and a Newman–Shanks–Williams prime. It is an Eisenstein prime with no imaginary part and real part of the form 3n − 1 (with no exponentiation implied). Because the next odd number, 241 is prime, 239 is a Chen prime. 239 is also a happy number.
HAKMEM (incidentally AI memo 239 of the MIT AI Lab) included an item on the properties of 239, including these:
239 is also:
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Wikipedia