23507917 has 2 divisors, whose sum is σ = 23507918. Its totient is φ = 23507916.

The previous prime is 23507881. The next prime is 23507927. The reversal of 23507917 is 71970532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23222761 + 285156 = 4819^2 + 534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23507917 is a prime.

It is equal to p_1478185 and since 23507917 and 1478185 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23507927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11753958 + 11753959.

It is an arithmetic number, because the mean of its divisors is an integer number (11753959).

Almost surely, 2^23507917 is an apocalyptic number.

It is an amenable number.

23507917 is a deficient number, since it is larger than the sum of its proper divisors (1).

23507917 is an equidigital number, since it uses as much as digits as its factorization.

23507917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 23507917 is about 4848.4963648537. The cubic root of 23507917 is about 286.4648779722.

The spelling of 23507917 in words is "twenty-three million, five hundred seven thousand, nine hundred seventeen".