13696979 has 4 divisors (see below), whose sum is σ = 13714680. Its totient is φ = 13679280.

The previous prime is 13696973. The next prime is 13696987. The reversal of 13696979 is 97969631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13696979 - 2⁸ = 13696723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13696973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7634 + ... + 9255.

It is an arithmetic number, because the mean of its divisors is an integer number (3428670).

Almost surely, 2^13696979 is an apocalyptic number.

13696979 is a deficient number, since it is larger than the sum of its proper divisors (17701).

13696979 is an equidigital number, since it uses as much as digits as its factorization.

13696979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17700.

The product of its digits is 551124, while the sum is 50.

The square root of 13696979 is about 3700.9429879424. The cubic root of 13696979 is about 239.2626618066.

The spelling of 13696979 in words is "thirteen million, six hundred ninety-six thousand, nine hundred seventy-nine".