23929399 has 4 divisors (see below), whose sum is σ = 25770136. Its totient is φ = 22088664.

The previous prime is 23929391. The next prime is 23929463. The reversal of 23929399 is 99392932.

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

It is not a de Polignac number, because 23929399 - 2³ = 23929391 is a prime.

It is a super-2 number, since 2×23929399² = 1145232273002402, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23929391) 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 3 ways as a sum of consecutive naturals, for example, 920349 + ... + 920374.

It is an arithmetic number, because the mean of its divisors is an integer number (6442534).

Almost surely, 2^23929399 is an apocalyptic number.

23929399 is a deficient number, since it is larger than the sum of its proper divisors (1840737).

23929399 is a wasteful number, since it uses less digits than its factorization.

23929399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840736.

The product of its digits is 236196, while the sum is 46.

The square root of 23929399 is about 4891.7684941134. The cubic root of 23929399 is about 288.1667910860.

The spelling of 23929399 in words is "twenty-three million, nine hundred twenty-nine thousand, three hundred ninety-nine".