13381491 has 16 divisors (see below), whose sum is σ = 19389440. Its totient is φ = 8177760.

The previous prime is 13381483. The next prime is 13381507. The reversal of 13381491 is 19418331.

It is not a de Polignac number, because 13381491 - 2³ = 13381483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13381421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2020 + ... + 5553.

It is an arithmetic number, because the mean of its divisors is an integer number (1211840).

Almost surely, 2^13381491 is an apocalyptic number.

13381491 is a deficient number, since it is larger than the sum of its proper divisors (6007949).

13381491 is a wasteful number, since it uses less digits than its factorization.

13381491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7626.

The product of its digits is 2592, while the sum is 30.

The square root of 13381491 is about 3658.0720331891. The cubic root of 13381491 is about 237.4113634156.

The spelling of 13381491 in words is "thirteen million, three hundred eighty-one thousand, four hundred ninety-one".