13204639 has 16 divisors (see below), whose sum is σ = 16058880. Its totient is φ = 10605600.

The previous prime is 13204627. The next prime is 13204643. The reversal of 13204639 is 93640231.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13204639 is a prime.

It is a super-2 number, since 2×13204639² = 348724982240642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13204619) 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, 12942 + ... + 13924.

It is an arithmetic number, because the mean of its divisors is an integer number (1003680).

Almost surely, 2^13204639 is an apocalyptic number.

13204639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13204639 is a deficient number, since it is larger than the sum of its proper divisors (2854241).

13204639 is a wasteful number, since it uses less digits than its factorization.

13204639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 13204639 is about 3633.8187901985. The cubic root of 13204639 is about 236.3608324439.

The spelling of 13204639 in words is "thirteen million, two hundred four thousand, six hundred thirty-nine".