13972879 has 4 divisors (see below), whose sum is σ = 13994680. Its totient is φ = 13951080.

The previous prime is 13972831. The next prime is 13972883. The reversal of 13972879 is 97827931.

It is a happy number.

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 13972879 - 2⁹ = 13972367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13972279) 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, 9909 + ... + 11230.

It is an arithmetic number, because the mean of its divisors is an integer number (3498670).

Almost surely, 2^13972879 is an apocalyptic number.

13972879 is a deficient number, since it is larger than the sum of its proper divisors (21801).

13972879 is an equidigital number, since it uses as much as digits as its factorization.

13972879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21800.

The product of its digits is 190512, while the sum is 46.

The square root of 13972879 is about 3738.0314337897. The cubic root of 13972879 is about 240.8584937442.

The spelling of 13972879 in words is "thirteen million, nine hundred seventy-two thousand, eight hundred seventy-nine".