23109979 has 2 divisors, whose sum is σ = 23109980. Its totient is φ = 23109978.

The previous prime is 23109971. The next prime is 23110027. The reversal of 23109979 is 97990132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23109979 - 2³ = 23109971 is a prime.

It is a super-2 number, since 2×23109979² = 1068142258760882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23109971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11554989 + 11554990.

It is an arithmetic number, because the mean of its divisors is an integer number (11554990).

Almost surely, 2^23109979 is an apocalyptic number.

23109979 is a deficient number, since it is larger than the sum of its proper divisors (1).

23109979 is an equidigital number, since it uses as much as digits as its factorization.

23109979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 23109979 is about 4807.2839525037. The cubic root of 23109979 is about 284.8392609561.

The spelling of 23109979 in words is "twenty-three million, one hundred nine thousand, nine hundred seventy-nine".