13657613 has 4 divisors (see below), whose sum is σ = 14461020. Its totient is φ = 12854208.

The previous prime is 13657601. The next prime is 13657619. The reversal of 13657613 is 31675631.

13657613 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11546404 + 2111209 = 3398^2 + 1453^2 .

It is a cyclic number.

It is not a de Polignac number, because 13657613 - 2⁴ = 13657597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13657613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13657619) 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, 401678 + ... + 401711.

It is an arithmetic number, because the mean of its divisors is an integer number (3615255).

Almost surely, 2^13657613 is an apocalyptic number.

It is an amenable number.

13657613 is a deficient number, since it is larger than the sum of its proper divisors (803407).

13657613 is an equidigital number, since it uses as much as digits as its factorization.

13657613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803406.

The product of its digits is 11340, while the sum is 32.

The square root of 13657613 is about 3695.6207868232. The cubic root of 13657613 is about 239.0332230911.

The spelling of 13657613 in words is "thirteen million, six hundred fifty-seven thousand, six hundred thirteen".