13979667 has 24 divisors (see below), whose sum is σ = 20797392. Its totient is φ = 8303040.

The previous prime is 13979639. The next prime is 13979671. The reversal of 13979667 is 76697931.

It is not a de Polignac number, because 13979667 - 2⁸ = 13979411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13979677) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37293 + ... + 37665.

It is an arithmetic number, because the mean of its divisors is an integer number (866558).

Almost surely, 2^13979667 is an apocalyptic number.

13979667 is a deficient number, since it is larger than the sum of its proper divisors (6817725).

13979667 is a wasteful number, since it uses less digits than its factorization.

13979667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 420 counting only the distinct ones).

The product of its digits is 428652, while the sum is 48.

The square root of 13979667 is about 3738.9392880869. The cubic root of 13979667 is about 240.8974903073.

The spelling of 13979667 in words is "thirteen million, nine hundred seventy-nine thousand, six hundred sixty-seven".