13389831 has 24 divisors (see below), whose sum is σ = 23805600. Its totient is φ = 7062336.

The previous prime is 13389823. The next prime is 13389833. The reversal of 13389831 is 13898331.

13389831 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13389831 - 2³ = 13389823 is a prime.

It is a super-2 number, since 2×13389831² = 358575148417122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13389833) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7356 + ... + 8993.

It is an arithmetic number, because the mean of its divisors is an integer number (991900).

Almost surely, 2^13389831 is an apocalyptic number.

13389831 is a deficient number, since it is larger than the sum of its proper divisors (10415769).

13389831 is a wasteful number, since it uses less digits than its factorization.

13389831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16375 (or 16372 counting only the distinct ones).

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

The square root of 13389831 is about 3659.2118003745. The cubic root of 13389831 is about 237.4606752989.

The spelling of 13389831 in words is "thirteen million, three hundred eighty-nine thousand, eight hundred thirty-one".