911 (number)
From HandWiki
Short description: Natural number
| ||||
|---|---|---|---|---|
| Cardinal | nine hundred eleven | |||
| Ordinal | 911th (nine hundred eleventh) | |||
| Factorization | prime | |||
| Prime | Yes | |||
| Greek numeral | ϠΙΑ´ | |||
| Roman numeral | CMXI | |||
| Binary | 11100011112 | |||
| Ternary | 10202023 | |||
| Quaternary | 320334 | |||
| Quinary | 121215 | |||
| Senary | 41156 | |||
| Octal | 16178 | |||
| Duodecimal | 63B12 | |||
| Hexadecimal | 38F16 | |||
| Vigesimal | 25B20 | |||
| Base 36 | PB36 | |||
911 (nine hundred [and] eleven) is the integer following 910 and preceding 912.
It is a prime number, a Sophie Germain prime, and the sum of three consecutive primes (293 + 307 + 311). It is an Eisenstein prime with no imaginary part and real part of the form [math]\displaystyle{ 3n-1 }[/math]. Since 913 is a semiprime, 911 is a Chen prime. It is also a centered decagonal number.[1]
There are 911 inverse semigroups of order 7 (sequence A001428 in the OEIS)
911 is obtained by concatenating its product of digits and sum of digits.
References
- ↑ Sloane, N. J. A., ed. "Sequence A062786 (Centered 10-gonal numbers)". OEIS Foundation. https://oeis.org/A062786. Retrieved 2016-06-02.
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