13399613 has 4 divisors (see below), whose sum is σ = 13406940. Its totient is φ = 13392288.

The previous prime is 13399601. The next prime is 13399627. The reversal of 13399613 is 31699331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 597529 + 12802084 = 773^2 + 3578^2 .

It is a cyclic number.

It is not a de Polignac number, because 13399613 - 2²² = 9205309 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 (13399663) 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, 1631 + ... + 5427.

It is an arithmetic number, because the mean of its divisors is an integer number (3351735).

Almost surely, 2^13399613 is an apocalyptic number.

It is an amenable number.

13399613 is a deficient number, since it is larger than the sum of its proper divisors (7327).

13399613 is an equidigital number, since it uses as much as digits as its factorization.

13399613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7326.

The product of its digits is 13122, while the sum is 35.

The square root of 13399613 is about 3660.5481829912. The cubic root of 13399613 is about 237.5184872036.

The spelling of 13399613 in words is "thirteen million, three hundred ninety-nine thousand, six hundred thirteen".