13902979 has 4 divisors (see below), whose sum is σ = 13914784. Its totient is φ = 13891176.

The previous prime is 13902961. The next prime is 13902983. The reversal of 13902979 is 97920931.

13902979 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 13902979 - 2⁵ = 13902947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13902949) 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, 3912 + ... + 6565.

It is an arithmetic number, because the mean of its divisors is an integer number (3478696).

Almost surely, 2^13902979 is an apocalyptic number.

13902979 is a deficient number, since it is larger than the sum of its proper divisors (11805).

13902979 is a wasteful number, since it uses less digits than its factorization.

13902979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11804.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 13902979 is about 3728.6698700743. The cubic root of 13902979 is about 240.4561867390.

The spelling of 13902979 in words is "thirteen million, nine hundred two thousand, nine hundred seventy-nine".