23909400497 has 2 divisors, whose sum is σ = 23909400498. Its totient is φ = 23909400496.

The previous prime is 23909400343. The next prime is 23909400509. The reversal of 23909400497 is 79400490932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11977989136 + 11931411361 = 109444^2 + 109231^2 .

It is a cyclic number.

It is not a de Polignac number, because 23909400497 - 2²⁴ = 23892623281 is a prime.

It is not a weakly prime, because it can be changed into another prime (23909400997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11954700248 + 11954700249.

It is an arithmetic number, because the mean of its divisors is an integer number (11954700249).

Almost surely, 2^23909400497 is an apocalyptic number.

It is an amenable number.

23909400497 is a deficient number, since it is larger than the sum of its proper divisors (1).

23909400497 is an equidigital number, since it uses as much as digits as its factorization.

23909400497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 47.

The spelling of 23909400497 in words is "twenty-three billion, nine hundred nine million, four hundred thousand, four hundred ninety-seven".