23372509 has 2 divisors, whose sum is σ = 23372510. Its totient is φ = 23372508.

The previous prime is 23372491. The next prime is 23372513. The reversal of 23372509 is 90527332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13468900 + 9903609 = 3670^2 + 3147^2 .

It is a cyclic number.

It is not a de Polignac number, because 23372509 - 2⁵ = 23372477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23372519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11686254 + 11686255.

It is an arithmetic number, because the mean of its divisors is an integer number (11686255).

Almost surely, 2^23372509 is an apocalyptic number.

It is an amenable number.

23372509 is a deficient number, since it is larger than the sum of its proper divisors (1).

23372509 is an equidigital number, since it uses as much as digits as its factorization.

23372509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 31.

The square root of 23372509 is about 4834.5122815027. The cubic root of 23372509 is about 285.9137962116.

The spelling of 23372509 in words is "twenty-three million, three hundred seventy-two thousand, five hundred nine".