12668931 has 24 divisors (see below), whose sum is σ = 20248176. Its totient is φ = 7568640.

The previous prime is 12668921. The next prime is 12668933. The reversal of 12668931 is 13986621.

It is not a de Polignac number, because 12668931 - 2⁵ = 12668899 is a prime.

It is a super-2 number, since 2×12668931² = 321003625365522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12668933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6351 + ... + 8103.

It is an arithmetic number, because the mean of its divisors is an integer number (843674).

Almost surely, 2^12668931 is an apocalyptic number.

12668931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12668931 is a deficient number, since it is larger than the sum of its proper divisors (7579245).

12668931 is a wasteful number, since it uses less digits than its factorization.

12668931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843 (or 1840 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 12668931 is about 3559.3441811660. The cubic root of 12668931 is about 233.1202446878.

The spelling of 12668931 in words is "twelve million, six hundred sixty-eight thousand, nine hundred thirty-one".