23399309 has 2 divisors, whose sum is σ = 23399310. Its totient is φ = 23399308.

The previous prime is 23399291. The next prime is 23399323. The reversal of 23399309 is 90399332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22829284 + 570025 = 4778^2 + 755^2 .

It is a cyclic number.

It is not a de Polignac number, because 23399309 - 2⁸ = 23399053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23399339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11699654 + 11699655.

It is an arithmetic number, because the mean of its divisors is an integer number (11699655).

Almost surely, 2^23399309 is an apocalyptic number.

It is an amenable number.

23399309 is a deficient number, since it is larger than the sum of its proper divisors (1).

23399309 is an equidigital number, since it uses as much as digits as its factorization.

23399309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 38.

The square root of 23399309 is about 4837.2832251172. The cubic root of 23399309 is about 286.0230351310.

The spelling of 23399309 in words is "twenty-three million, three hundred ninety-nine thousand, three hundred nine".