12999931 has 8 divisors (see below), whose sum is σ = 14901984. Its totient is φ = 11109120.

The previous prime is 12999929. The next prime is 12999937. The reversal of 12999931 is 13999921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12999931 - 2¹ = 12999929 is a prime.

It is a super-2 number, since 2×12999931² = 337996412009522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12999937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160 + ... + 5101.

It is an arithmetic number, because the mean of its divisors is an integer number (1862748).

Almost surely, 2^12999931 is an apocalyptic number.

12999931 is a deficient number, since it is larger than the sum of its proper divisors (1902053).

12999931 is an equidigital number, since it uses as much as digits as its factorization.

12999931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5621.

The product of its digits is 39366, while the sum is 43.

The square root of 12999931 is about 3605.5417068729. The cubic root of 12999931 is about 235.1330527660.

The spelling of 12999931 in words is "twelve million, nine hundred ninety-nine thousand, nine hundred thirty-one".