13989879 has 12 divisors (see below), whose sum is σ = 20638176. Its totient is φ = 9127872.

The previous prime is 13989869. The next prime is 13989907. The reversal of 13989879 is 97898931.

It is not a de Polignac number, because 13989879 - 2⁴ = 13989863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13989869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16114 + ... + 16959.

It is an arithmetic number, because the mean of its divisors is an integer number (1719848).

Almost surely, 2^13989879 is an apocalyptic number.

13989879 is a deficient number, since it is larger than the sum of its proper divisors (6648297).

13989879 is a wasteful number, since it uses less digits than its factorization.

13989879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33126 (or 33123 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The square root of 13989879 is about 3740.3046667351. The cubic root of 13989879 is about 240.9561337262.

The spelling of 13989879 in words is "thirteen million, nine hundred eighty-nine thousand, eight hundred seventy-nine".