23208939 has 18 divisors (see below), whose sum is σ = 36303540. Its totient is φ = 14281488.

The previous prime is 23208931. The next prime is 23208943. The reversal of 23208939 is 93980232.

It is not a de Polignac number, because 23208939 - 2³ = 23208931 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (23208931) 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 in 17 ways as a sum of consecutive naturals, for example, 6109 + ... + 9150.

Almost surely, 2^23208939 is an apocalyptic number.

23208939 is a deficient number, since it is larger than the sum of its proper divisors (13094601).

23208939 is a wasteful number, since it uses less digits than its factorization.

23208939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15291 (or 15275 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 23208939 is about 4817.5656715814. The cubic root of 23208939 is about 285.2452551838.

The spelling of 23208939 in words is "twenty-three million, two hundred eight thousand, nine hundred thirty-nine".