23909379997 has 2 divisors, whose sum is σ = 23909379998. Its totient is φ = 23909379996.

The previous prime is 23909379979. The next prime is 23909380021. The reversal of 23909379997 is 79997390932.

Together with previous prime (23909379979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14703745081 + 9205634916 = 121259^2 + 95946^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23909379997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23909379947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11954689998 + 11954689999.

It is an arithmetic number, because the mean of its divisors is an integer number (11954689999).

Almost surely, 2^23909379997 is an apocalyptic number.

It is an amenable number.

23909379997 is a deficient number, since it is larger than the sum of its proper divisors (1).

23909379997 is an equidigital number, since it uses as much as digits as its factorization.

23909379997 is an evil number, because the sum of its binary digits is even.

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

The spelling of 23909379997 in words is "twenty-three billion, nine hundred nine million, three hundred seventy-nine thousand, nine hundred ninety-seven".