13390491 has 4 divisors (see below), whose sum is σ = 17853992. Its totient is φ = 8926992.

The previous prime is 13390483. The next prime is 13390519. The reversal of 13390491 is 19409331.

13390491 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19409331 = 3 ⋅6469777.

It is not a de Polignac number, because 13390491 - 2³ = 13390483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13390591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2231746 + ... + 2231751.

It is an arithmetic number, because the mean of its divisors is an integer number (4463498).

Almost surely, 2^13390491 is an apocalyptic number.

13390491 is a deficient number, since it is larger than the sum of its proper divisors (4463501).

13390491 is an equidigital number, since it uses as much as digits as its factorization.

13390491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4463500.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 13390491 is about 3659.3019826191. The cubic root of 13390491 is about 237.4645768037.

The spelling of 13390491 in words is "thirteen million, three hundred ninety thousand, four hundred ninety-one".