23920399 has 4 divisors (see below), whose sum is σ = 23997136. Its totient is φ = 23843664.

The previous prime is 23920387. The next prime is 23920423. The reversal of 23920399 is 99302932.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23920399 - 2⁵ = 23920367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23920319) 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 3 ways as a sum of consecutive naturals, for example, 37899 + ... + 38524.

It is an arithmetic number, because the mean of its divisors is an integer number (5999284).

Almost surely, 2^23920399 is an apocalyptic number.

23920399 is a deficient number, since it is larger than the sum of its proper divisors (76737).

23920399 is an equidigital number, since it uses as much as digits as its factorization.

23920399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76736.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 23920399 is about 4890.8484948933. The cubic root of 23920399 is about 288.1306594315.

The spelling of 23920399 in words is "twenty-three million, nine hundred twenty thousand, three hundred ninety-nine".