13136639 has 2 divisors, whose sum is σ = 13136640. Its totient is φ = 13136638.

The previous prime is 13136603. The next prime is 13136647. The reversal of 13136639 is 93663131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13136639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13136689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6568319 + 6568320.

It is an arithmetic number, because the mean of its divisors is an integer number (6568320).

Almost surely, 2^13136639 is an apocalyptic number.

13136639 is a deficient number, since it is larger than the sum of its proper divisors (1).

13136639 is an equidigital number, since it uses as much as digits as its factorization.

13136639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8748, while the sum is 32.

The square root of 13136639 is about 3624.4501651975. The cubic root of 13136639 is about 235.9544044348.

The spelling of 13136639 in words is "thirteen million, one hundred thirty-six thousand, six hundred thirty-nine".