22920979 has 2 divisors, whose sum is σ = 22920980. Its totient is φ = 22920978.

The previous prime is 22920907. The next prime is 22920983. The reversal of 22920979 is 97902922.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22920979 is a prime.

It is not a weakly prime, because it can be changed into another prime (22921979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11460489 + 11460490.

It is an arithmetic number, because the mean of its divisors is an integer number (11460490).

Almost surely, 2^22920979 is an apocalyptic number.

22920979 is a deficient number, since it is larger than the sum of its proper divisors (1).

22920979 is an equidigital number, since it uses as much as digits as its factorization.

22920979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 22920979 is about 4787.5859261218. The cubic root of 22920979 is about 284.0606355686.

The spelling of 22920979 in words is "twenty-two million, nine hundred twenty thousand, nine hundred seventy-nine".