13688879 has 2 divisors, whose sum is σ = 13688880. Its totient is φ = 13688878.

The previous prime is 13688867. The next prime is 13688881. The reversal of 13688879 is 97888631.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13688879 - 2⁴ = 13688863 is a prime.

It is a Sophie Germain prime.

Together with 13688881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13688809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6844439 + 6844440.

It is an arithmetic number, because the mean of its divisors is an integer number (6844440).

Almost surely, 2^13688879 is an apocalyptic number.

13688879 is a deficient number, since it is larger than the sum of its proper divisors (1).

13688879 is an equidigital number, since it uses as much as digits as its factorization.

13688879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 50.

The square root of 13688879 is about 3699.8485104123. The cubic root of 13688879 is about 239.2154881509.

The spelling of 13688879 in words is "thirteen million, six hundred eighty-eight thousand, eight hundred seventy-nine".