13290831 has 8 divisors (see below), whose sum is σ = 19690160. Its totient is φ = 8860536.

The previous prime is 13290829. The next prime is 13290853. The reversal of 13290831 is 13809231.

It is not a de Polignac number, because 13290831 - 2¹ = 13290829 is a prime.

It is a super-2 number, since 2×13290831² = 353292377341122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 492253 = 13290831 / (1 + 3 + 2 + 9 + 0 + 8 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13290795 and 13290804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13290731) 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, 246100 + ... + 246153.

It is an arithmetic number, because the mean of its divisors is an integer number (2461270).

Almost surely, 2^13290831 is an apocalyptic number.

13290831 is a deficient number, since it is larger than the sum of its proper divisors (6399329).

13290831 is an equidigital number, since it uses as much as digits as its factorization.

13290831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492262 (or 492256 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 13290831 is about 3645.6591996510. The cubic root of 13290831 is about 236.8739916601.

Subtracting 13290831 from its reverse (13809231), we obtain a square (518400 = 720²).

The spelling of 13290831 in words is "thirteen million, two hundred ninety thousand, eight hundred thirty-one".