12813969 has 32 divisors (see below), whose sum is σ = 20632320. Its totient is φ = 6918912.

The previous prime is 12813959. The next prime is 12813973. The reversal of 12813969 is 96931821.

It is not a de Polignac number, because 12813969 - 2⁷ = 12813841 is a prime.

It is a super-2 number, since 2×12813969² = 328395603065922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12813929) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32079 + ... + 32475.

It is an arithmetic number, because the mean of its divisors is an integer number (644760).

Almost surely, 2^12813969 is an apocalyptic number.

It is an amenable number.

12813969 is a deficient number, since it is larger than the sum of its proper divisors (7818351).

12813969 is a wasteful number, since it uses less digits than its factorization.

12813969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489.

The product of its digits is 23328, while the sum is 39.

The square root of 12813969 is about 3579.6604587586. The cubic root of 12813969 is about 234.0064831281.

The spelling of 12813969 in words is "twelve million, eight hundred thirteen thousand, nine hundred sixty-nine".