| ||||
---|---|---|---|---|
Cardinal | nine hundred eleven | |||
Ordinal | 911th (nine hundred eleventh) | |||
Factorization | prime | |||
Prime | Yes | |||
Greek numeral | ϠΙΑ´ | |||
Roman numeral | CMXI | |||
Binary | 11100011112 | |||
Ternary | 10202023 | |||
Senary | 41156 | |||
Octal | 16178 | |||
Duodecimal | 63B12 | |||
Hexadecimal | 38F16 |
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 . 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
[edit]- ^ Sloane, N. J. A. (ed.). "Sequence A062786 (Centered 10-gonal numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved June 2, 2016.