13479979 has 2 divisors, whose sum is σ = 13479980. Its totient is φ = 13479978.

The previous prime is 13479943. The next prime is 13480003. The reversal of 13479979 is 97997431.

It is a happy number.

13479979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13479979 - 2⁹ = 13479467 is a prime.

It is not a weakly prime, because it can be changed into another prime (13479779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6739989 + 6739990.

It is an arithmetic number, because the mean of its divisors is an integer number (6739990).

Almost surely, 2^13479979 is an apocalyptic number.

13479979 is a deficient number, since it is larger than the sum of its proper divisors (1).

13479979 is an equidigital number, since it uses as much as digits as its factorization.

13479979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 49.

The square root of 13479979 is about 3671.5090902788. The cubic root of 13479979 is about 237.9923908308.

The spelling of 13479979 in words is "thirteen million, four hundred seventy-nine thousand, nine hundred seventy-nine".