23399939 has 4 divisors (see below), whose sum is σ = 24776424. Its totient is φ = 22023456.

The previous prime is 23399921. The next prime is 23399953. The reversal of 23399939 is 93999332.

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 23399939 - 2¹⁶ = 23334403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23399893 and 23399902.

It is not an unprimeable number, because it can be changed into a prime (23399039) 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, 688217 + ... + 688250.

It is an arithmetic number, because the mean of its divisors is an integer number (6194106).

Almost surely, 2^23399939 is an apocalyptic number.

23399939 is a deficient number, since it is larger than the sum of its proper divisors (1376485).

23399939 is a wasteful number, since it uses less digits than its factorization.

23399939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376484.

The product of its digits is 354294, while the sum is 47.

The square root of 23399939 is about 4837.3483438760. The cubic root of 23399939 is about 286.0256020571.

The spelling of 23399939 in words is "twenty-three million, three hundred ninety-nine thousand, nine hundred thirty-nine".