23909899 has 8 divisors (see below), whose sum is σ = 25991280. Its totient is φ = 21863136.

The previous prime is 23909867. The next prime is 23909911. The reversal of 23909899 is 99890932.

23909899 = 222² + 223² + ... + 435².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23909899 - 2⁵ = 23909867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23909399) 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 7 ways as a sum of consecutive naturals, for example, 7204 + ... + 9985.

It is an arithmetic number, because the mean of its divisors is an integer number (3248910).

Almost surely, 2^23909899 is an apocalyptic number.

23909899 is a deficient number, since it is larger than the sum of its proper divisors (2081381).

23909899 is a wasteful number, since it uses less digits than its factorization.

23909899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17309.

The product of its (nonzero) digits is 314928, while the sum is 49.

The square root of 23909899 is about 4889.7749436963. The cubic root of 23909899 is about 288.0884943781.

The spelling of 23909899 in words is "twenty-three million, nine hundred nine thousand, eight hundred ninety-nine".