123616931 has 2 divisors, whose sum is σ = 123616932. Its totient is φ = 123616930.

The previous prime is 123616891. The next prime is 123616981. The reversal of 123616931 is 139616321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123616931 is a prime.

It is a super-2 number, since 2×123616931² = 30562291259717522, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (123616981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61808465 + 61808466.

It is an arithmetic number, because the mean of its divisors is an integer number (61808466).

Almost surely, 2^123616931 is an apocalyptic number.

123616931 is a deficient number, since it is larger than the sum of its proper divisors (1).

123616931 is an equidigital number, since it uses as much as digits as its factorization.

123616931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 32.

The square root of 123616931 is about 11118.3151151602. The cubic root of 123616931 is about 498.1490645308.

The spelling of 123616931 in words is "one hundred twenty-three million, six hundred sixteen thousand, nine hundred thirty-one".