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107971931 is a prime number
BaseRepresentation
bin1100110111110…
…00010101011011
321112011112122102
412123320111123
5210120100211
614414114015
72450513654
oct633702533
9245145572
10107971931
1155a46a01
12301ab90b
13194a5222
14104a852b
15972ba3b
hex66f855b

107971931 has 2 divisors, whose sum is σ = 107971932. Its totient is φ = 107971930.

The previous prime is 107971921. The next prime is 107971933. The reversal of 107971931 is 139179701.

It is a strong prime.

It is an emirp because it is prime and its reverse (139179701) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 107971931 - 218 = 107709787 is a prime.

It is a super-2 number, since 2×1079719312 = 23315875767737522, which contains 22 as substring.

Together with 107971933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (107971933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53985965 + 53985966.

It is an arithmetic number, because the mean of its divisors is an integer number (53985966).

Almost surely, 2107971931 is an apocalyptic number.

107971931 is a deficient number, since it is larger than the sum of its proper divisors (1).

107971931 is an equidigital number, since it uses as much as digits as its factorization.

107971931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11907, while the sum is 38.

The square root of 107971931 is about 10390.9542872635. The cubic root of 107971931 is about 476.1790557564.

The spelling of 107971931 in words is "one hundred seven million, nine hundred seventy-one thousand, nine hundred thirty-one".