13603613 has 4 divisors (see below), whose sum is σ = 13806720. Its totient is φ = 13400508.

The previous prime is 13603607. The next prime is 13603631. The reversal of 13603613 is 31630631.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31630631 = 1151 ⋅27481.

It is a cyclic number.

It is not a de Polignac number, because 13603613 - 2⁸ = 13603357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13603643) 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, 101453 + ... + 101586.

It is an arithmetic number, because the mean of its divisors is an integer number (3451680).

Almost surely, 2^13603613 is an apocalyptic number.

It is an amenable number.

13603613 is a deficient number, since it is larger than the sum of its proper divisors (203107).

13603613 is an equidigital number, since it uses as much as digits as its factorization.

13603613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203106.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 13603613 is about 3688.3076064775. The cubic root of 13603613 is about 238.7177740373.

The spelling of 13603613 in words is "thirteen million, six hundred three thousand, six hundred thirteen".