13631613 has 4 divisors (see below), whose sum is σ = 18175488. Its totient is φ = 9087740.

The previous prime is 13631593. The next prime is 13631621. The reversal of 13631613 is 31613631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13631613 - 2⁵ = 13631581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13635613) 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, 2271933 + ... + 2271938.

It is an arithmetic number, because the mean of its divisors is an integer number (4543872).

Almost surely, 2^13631613 is an apocalyptic number.

It is an amenable number.

13631613 is a deficient number, since it is larger than the sum of its proper divisors (4543875).

13631613 is an equidigital number, since it uses as much as digits as its factorization.

13631613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4543874.

The product of its digits is 972, while the sum is 24.

The square root of 13631613 is about 3692.1014341429. The cubic root of 13631613 is about 238.8814442084.

The spelling of 13631613 in words is "thirteen million, six hundred thirty-one thousand, six hundred thirteen".