23757317917 has 2 divisors, whose sum is σ = 23757317918. Its totient is φ = 23757317916.

The previous prime is 23757317887. The next prime is 23757317951. The reversal of 23757317917 is 71971375732.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23736332356 + 20985561 = 154066^2 + 4581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23757317917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23757317977) 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, 11878658958 + 11878658959.

It is an arithmetic number, because the mean of its divisors is an integer number (11878658959).

Almost surely, 2^23757317917 is an apocalyptic number.

It is an amenable number.

23757317917 is a deficient number, since it is larger than the sum of its proper divisors (1).

23757317917 is an equidigital number, since it uses as much as digits as its factorization.

23757317917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944810, while the sum is 52.

The spelling of 23757317917 in words is "twenty-three billion, seven hundred fifty-seven million, three hundred seventeen thousand, nine hundred seventeen".