13968979 has 4 divisors (see below), whose sum is σ = 13978584. Its totient is φ = 13959376.

The previous prime is 13968961. The next prime is 13968989. The reversal of 13968979 is 97986931.

13968979 is digitally balanced in base 2, 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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 97986931 = 7 ⋅13998133.

It is a cyclic number.

It is not a de Polignac number, because 13968979 - 2⁹ = 13968467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13968919) 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, 2122 + ... + 5695.

It is an arithmetic number, because the mean of its divisors is an integer number (3494646).

Almost surely, 2^13968979 is an apocalyptic number.

13968979 is a deficient number, since it is larger than the sum of its proper divisors (9605).

13968979 is an equidigital number, since it uses as much as digits as its factorization.

13968979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9604.

The product of its digits is 734832, while the sum is 52.

The square root of 13968979 is about 3737.5097324288. The cubic root of 13968979 is about 240.8360828167.

The spelling of 13968979 in words is "thirteen million, nine hundred sixty-eight thousand, nine hundred seventy-nine".