22005979 has 2 divisors, whose sum is σ = 22005980. Its totient is φ = 22005978.

The previous prime is 22005961. The next prime is 22005989. The reversal of 22005979 is 97950022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22005979 - 2⁵ = 22005947 is a prime.

It is a super-2 number, since 2×22005979² = 968526223496882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22005989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11002989 + 11002990.

It is an arithmetic number, because the mean of its divisors is an integer number (11002990).

Almost surely, 2^22005979 is an apocalyptic number.

22005979 is a deficient number, since it is larger than the sum of its proper divisors (1).

22005979 is an equidigital number, since it uses as much as digits as its factorization.

22005979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 22005979 is about 4691.0530800664. The cubic root of 22005979 is about 280.2293146954.

The spelling of 22005979 in words is "twenty-two million, five thousand, nine hundred seventy-nine".