18796979 has 2 divisors, whose sum is σ = 18796980. Its totient is φ = 18796978.

The previous prime is 18796961. The next prime is 18796993. The reversal of 18796979 is 97969781.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18796979 is a prime.

It is not a weakly prime, because it can be changed into another prime (18796949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9398489 + 9398490.

It is an arithmetic number, because the mean of its divisors is an integer number (9398490).

Almost surely, 2^18796979 is an apocalyptic number.

18796979 is a deficient number, since it is larger than the sum of its proper divisors (1).

18796979 is an equidigital number, since it uses as much as digits as its factorization.

18796979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1714608, while the sum is 56.

The square root of 18796979 is about 4335.5482928921. The cubic root of 18796979 is about 265.8863356306.

The spelling of 18796979 in words is "eighteen million, seven hundred ninety-six thousand, nine hundred seventy-nine".