23438917 has 2 divisors, whose sum is σ = 23438918. Its totient is φ = 23438916.

The previous prime is 23438897. The next prime is 23438923. The reversal of 23438917 is 71983432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22743361 + 695556 = 4769^2 + 834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23438917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23438927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11719458 + 11719459.

It is an arithmetic number, because the mean of its divisors is an integer number (11719459).

Almost surely, 2^23438917 is an apocalyptic number.

It is an amenable number.

23438917 is a deficient number, since it is larger than the sum of its proper divisors (1).

23438917 is an equidigital number, since it uses as much as digits as its factorization.

23438917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 23438917 is about 4841.3755276781. The cubic root of 23438917 is about 286.1843278468.

The spelling of 23438917 in words is "twenty-three million, four hundred thirty-eight thousand, nine hundred seventeen".