13023891 has 6 divisors (see below), whose sum is σ = 18812300. Its totient is φ = 8682588.

The previous prime is 13023877. The next prime is 13023893. The reversal of 13023891 is 19832031.

It is not a de Polignac number, because 13023891 - 2⁵ = 13023859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13023893) 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 5 ways as a sum of consecutive naturals, for example, 723541 + ... + 723558.

Almost surely, 2^13023891 is an apocalyptic number.

13023891 is a deficient number, since it is larger than the sum of its proper divisors (5788409).

13023891 is a wasteful number, since it uses less digits than its factorization.

13023891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447105 (or 1447102 counting only the distinct ones).

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

The square root of 13023891 is about 3608.8628402864. The cubic root of 13023891 is about 235.2774209758.

The spelling of 13023891 in words is "thirteen million, twenty-three thousand, eight hundred ninety-one".