23409913 has 2 divisors, whose sum is σ = 23409914. Its totient is φ = 23409912.

The previous prime is 23409887. The next prime is 23409917. The reversal of 23409913 is 31990432.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15586704 + 7823209 = 3948^2 + 2797^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23409913 is a prime.

It is not a weakly prime, because it can be changed into another prime (23409917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11704956 + 11704957.

It is an arithmetic number, because the mean of its divisors is an integer number (11704957).

Almost surely, 2^23409913 is an apocalyptic number.

It is an amenable number.

23409913 is a deficient number, since it is larger than the sum of its proper divisors (1).

23409913 is an equidigital number, since it uses as much as digits as its factorization.

23409913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 23409913 is about 4838.3791707554. The cubic root of 23409913 is about 286.0662348428.

The spelling of 23409913 in words is "twenty-three million, four hundred nine thousand, nine hundred thirteen".