12808931 has 4 divisors (see below), whose sum is σ = 12816600. Its totient is φ = 12801264.

The previous prime is 12808903. The next prime is 12808937. The reversal of 12808931 is 13980821.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12808931 - 2¹⁴ = 12792547 is a prime.

It is a super-2 number, since 2×12808931² = 328137426725522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12808937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146 + ... + 5063.

It is an arithmetic number, because the mean of its divisors is an integer number (3204150).

Almost surely, 2^12808931 is an apocalyptic number.

12808931 is a deficient number, since it is larger than the sum of its proper divisors (7669).

12808931 is an equidigital number, since it uses as much as digits as its factorization.

12808931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7668.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 12808931 is about 3578.9566915513. The cubic root of 12808931 is about 233.9758114136.

The spelling of 12808931 in words is "twelve million, eight hundred eight thousand, nine hundred thirty-one".