911 (number)

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Short description: Natural number
← 910 911 912 →
Cardinalnine hundred eleven
Ordinal911th
(nine hundred eleventh)
Factorizationprime
PrimeYes
Greek numeralϠΙΑ´
Roman numeralCMXI
Binary11100011112
Ternary10202023
Quaternary320334
Quinary121215
Senary41156
Octal16178
Duodecimal63B12
Hexadecimal38F16
Vigesimal25B20
Base 36PB36

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