12393831 has 16 divisors (see below), whose sum is σ = 17307648. Its totient is φ = 7879200.

The previous prime is 12393791. The next prime is 12393851. The reversal of 12393831 is 13839321.

It is not a de Polignac number, because 12393831 - 2¹⁴ = 12377447 is a prime.

It is a super-2 number, since 2×12393831² = 307214093713122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12393851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5665 + ... + 7541.

It is an arithmetic number, because the mean of its divisors is an integer number (1081728).

Almost surely, 2^12393831 is an apocalyptic number.

12393831 is a deficient number, since it is larger than the sum of its proper divisors (4913817).

12393831 is a wasteful number, since it uses less digits than its factorization.

12393831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982.

The product of its digits is 3888, while the sum is 30.

The square root of 12393831 is about 3520.4873242209. The cubic root of 12393831 is about 231.4205154837.

The spelling of 12393831 in words is "twelve million, three hundred ninety-three thousand, eight hundred thirty-one".