23931393 has 16 divisors (see below), whose sum is σ = 35565120. Its totient is φ = 14224896.

The previous prime is 23931389. The next prime is 23931407. The reversal of 23931393 is 39313932.

It is a happy number.

It is not a de Polignac number, because 23931393 - 2² = 23931389 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23931793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11380 + ... + 13317.

It is an arithmetic number, because the mean of its divisors is an integer number (2222820).

Almost surely, 2^23931393 is an apocalyptic number.

It is an amenable number.

23931393 is a deficient number, since it is larger than the sum of its proper divisors (11633727).

23931393 is a wasteful number, since it uses less digits than its factorization.

23931393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24736.

The product of its digits is 13122, while the sum is 33.

The square root of 23931393 is about 4891.9723016387. The cubic root of 23931393 is about 288.1747950288.

The spelling of 23931393 in words is "twenty-three million, nine hundred thirty-one thousand, three hundred ninety-three".