12961931 has 2 divisors, whose sum is σ = 12961932. Its totient is φ = 12961930.

The previous prime is 12961919. The next prime is 12961943. The reversal of 12961931 is 13916921.

It is a balanced prime because it is at equal distance from previous prime (12961919) and next prime (12961943).

It is a cyclic number.

It is not a de Polignac number, because 12961931 - 2⁶ = 12961867 is a prime.

It is a super-2 number, since 2×12961931² = 336023310497522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12961901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6480965 + 6480966.

It is an arithmetic number, because the mean of its divisors is an integer number (6480966).

Almost surely, 2^12961931 is an apocalyptic number.

12961931 is a deficient number, since it is larger than the sum of its proper divisors (1).

12961931 is an equidigital number, since it uses as much as digits as its factorization.

12961931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916, while the sum is 32.

The square root of 12961931 is about 3600.2681844552. The cubic root of 12961931 is about 234.9037239547.

The spelling of 12961931 in words is "twelve million, nine hundred sixty-one thousand, nine hundred thirty-one".