13399491 has 12 divisors (see below), whose sum is σ = 20783112. Its totient is φ = 7656768.

The previous prime is 13399489. The next prime is 13399499. The reversal of 13399491 is 19499331.

It is not a de Polignac number, because 13399491 - 2¹ = 13399489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13399499) 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 11 ways as a sum of consecutive naturals, for example, 45430 + ... + 45723.

It is an arithmetic number, because the mean of its divisors is an integer number (1731926).

Almost surely, 2^13399491 is an apocalyptic number.

13399491 is a deficient number, since it is larger than the sum of its proper divisors (7383621).

13399491 is an equidigital number, since it uses as much as digits as its factorization.

13399491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91170 (or 91163 counting only the distinct ones).

The product of its digits is 26244, while the sum is 39.

The square root of 13399491 is about 3660.5315187825. The cubic root of 13399491 is about 237.5177663533.

The spelling of 13399491 in words is "thirteen million, three hundred ninety-nine thousand, four hundred ninety-one".