23809903 has 12 divisors (see below), whose sum is σ = 26088480. Its totient is φ = 21717696.

The previous prime is 23809861. The next prime is 23809909. The reversal of 23809903 is 30990832.

It is a de Polignac number, because none of the positive numbers 2^k-23809903 is a prime.

It is a super-2 number, since 2×23809903² = 1133822961738818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23809909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14250 + ... + 15832.

It is an arithmetic number, because the mean of its divisors is an integer number (2174040).

Almost surely, 2^23809903 is an apocalyptic number.

23809903 is a deficient number, since it is larger than the sum of its proper divisors (2278577).

23809903 is a wasteful number, since it uses less digits than its factorization.

23809903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1698 (or 1685 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 23809903 is about 4879.5392200494. The cubic root of 23809903 is about 287.6863185469.

The spelling of 23809903 in words is "twenty-three million, eight hundred nine thousand, nine hundred three".