13685579 has 2 divisors, whose sum is σ = 13685580. Its totient is φ = 13685578.

The previous prime is 13685563. The next prime is 13685587. The reversal of 13685579 is 97558631.

13685579 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13685579 - 2⁴ = 13685563 is a prime.

It is not a weakly prime, because it can be changed into another prime (13685279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6842789 + 6842790.

It is an arithmetic number, because the mean of its divisors is an integer number (6842790).

Almost surely, 2^13685579 is an apocalyptic number.

13685579 is a deficient number, since it is larger than the sum of its proper divisors (1).

13685579 is an equidigital number, since it uses as much as digits as its factorization.

13685579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 44.

The square root of 13685579 is about 3699.4025193266. The cubic root of 13685579 is about 239.1962639189.

The spelling of 13685579 in words is "thirteen million, six hundred eighty-five thousand, five hundred seventy-nine".