13219979 has 2 divisors, whose sum is σ = 13219980. Its totient is φ = 13219978.

The previous prime is 13219961. The next prime is 13220003. The reversal of 13219979 is 97991231.

13219979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13219979 is a prime.

It is not a weakly prime, because it can be changed into another prime (13219909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6609989 + 6609990.

It is an arithmetic number, because the mean of its divisors is an integer number (6609990).

Almost surely, 2^13219979 is an apocalyptic number.

13219979 is a deficient number, since it is larger than the sum of its proper divisors (1).

13219979 is an equidigital number, since it uses as much as digits as its factorization.

13219979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 41.

The square root of 13219979 is about 3635.9289046955. The cubic root of 13219979 is about 236.4523248363.

The spelling of 13219979 in words is "thirteen million, two hundred nineteen thousand, nine hundred seventy-nine".