23199899 has 4 divisors (see below), whose sum is σ = 23209536. Its totient is φ = 23190264.

The previous prime is 23199881. The next prime is 23199907. The reversal of 23199899 is 99899132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23199899 is a prime.

It is a super-2 number, since 2×23199899² = 1076470627220402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23199829) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2237 + ... + 7169.

It is an arithmetic number, because the mean of its divisors is an integer number (5802384).

Almost surely, 2^23199899 is an apocalyptic number.

23199899 is a deficient number, since it is larger than the sum of its proper divisors (9637).

23199899 is an equidigital number, since it uses as much as digits as its factorization.

23199899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9636.

The product of its digits is 314928, while the sum is 50.

The square root of 23199899 is about 4816.6273470137. The cubic root of 23199899 is about 285.2082155475.

The spelling of 23199899 in words is "twenty-three million, one hundred ninety-nine thousand, eight hundred ninety-nine".