23258909 has 2 divisors, whose sum is σ = 23258910. Its totient is φ = 23258908.

The previous prime is 23258887. The next prime is 23258923. The reversal of 23258909 is 90985232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23251684 + 7225 = 4822^2 + 85^2 .

It is a cyclic number.

It is not a de Polignac number, because 23258909 - 2²⁰ = 22210333 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23258929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11629454 + 11629455.

It is an arithmetic number, because the mean of its divisors is an integer number (11629455).

Almost surely, 2^23258909 is an apocalyptic number.

It is an amenable number.

23258909 is a deficient number, since it is larger than the sum of its proper divisors (1).

23258909 is an equidigital number, since it uses as much as digits as its factorization.

23258909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 23258909 is about 4822.7491122803. The cubic root of 23258909 is about 285.4498241787.

The spelling of 23258909 in words is "twenty-three million, two hundred fifty-eight thousand, nine hundred nine".