13686613 has 2 divisors, whose sum is σ = 13686614. Its totient is φ = 13686612.

The previous prime is 13686577. The next prime is 13686619. The reversal of 13686613 is 31668631.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11675889 + 2010724 = 3417^2 + 1418^2 .

It is a cyclic number.

It is not a de Polignac number, because 13686613 - 2¹⁷ = 13555541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13686619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6843306 + 6843307.

It is an arithmetic number, because the mean of its divisors is an integer number (6843307).

Almost surely, 2^13686613 is an apocalyptic number.

It is an amenable number.

13686613 is a deficient number, since it is larger than the sum of its proper divisors (1).

13686613 is an equidigital number, since it uses as much as digits as its factorization.

13686613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 13686613 is about 3699.5422689841. The cubic root of 13686613 is about 239.2022878440.

The spelling of 13686613 in words is "thirteen million, six hundred eighty-six thousand, six hundred thirteen".