23925209 has 24 divisors (see below), whose sum is σ = 30745344. Its totient is φ = 18216000.

The previous prime is 23925197. The next prime is 23925217. The reversal of 23925209 is 90252932.

It is a happy number.

It is not a de Polignac number, because 23925209 - 2⁴ = 23925193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23925259) 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 23 ways as a sum of consecutive naturals, for example, 39509 + ... + 40109.

It is an arithmetic number, because the mean of its divisors is an integer number (1281056).

Almost surely, 2^23925209 is an apocalyptic number.

It is an amenable number.

23925209 is a deficient number, since it is larger than the sum of its proper divisors (6820135).

23925209 is a wasteful number, since it uses less digits than its factorization.

23925209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677 (or 666 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 23925209 is about 4891.3402048927. The cubic root of 23925209 is about 288.1499709208.

The spelling of 23925209 in words is "twenty-three million, nine hundred twenty-five thousand, two hundred nine".