23909379979 has 2 divisors, whose sum is σ = 23909379980. Its totient is φ = 23909379978.

The previous prime is 23909379973. The next prime is 23909379997. The reversal of 23909379979 is 97997390932.

Together with next prime (23909379997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23909379979 - 2⁵ = 23909379947 is a prime.

It is not a weakly prime, because it can be changed into another prime (23909379973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11954689989 + 11954689990.

It is an arithmetic number, because the mean of its divisors is an integer number (11954689990).

Almost surely, 2^23909379979 is an apocalyptic number.

23909379979 is a deficient number, since it is larger than the sum of its proper divisors (1).

23909379979 is an equidigital number, since it uses as much as digits as its factorization.

23909379979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52081218, while the sum is 67.

The spelling of 23909379979 in words is "twenty-three billion, nine hundred nine million, three hundred seventy-nine thousand, nine hundred seventy-nine".