9393939231 has 32 divisors (see below), whose sum is σ = 13325472000. Its totient is φ = 5877113088.

The previous prime is 9393939167. The next prime is 9393939257. The reversal of 9393939231 is 1329393939.

It is a happy number.

It is not a de Polignac number, because 9393939231 - 2⁶ = 9393939167 is a prime.

It is a super-2 number, since 2×9393939231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9393939281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 446556 + ... + 467118.

It is an arithmetic number, because the mean of its divisors is an integer number (416421000).

Almost surely, 2^9393939231 is an apocalyptic number.

9393939231 is a deficient number, since it is larger than the sum of its proper divisors (3931532769).

9393939231 is a wasteful number, since it uses less digits than its factorization.

9393939231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20743.

The product of its digits is 1062882, while the sum is 51.

The square root of 9393939231 is about 96922.3360789452. The cubic root of 9393939231 is about 2110.0006162633. Note that the first 3 decimals are identical.

The spelling of 9393939231 in words is "nine billion, three hundred ninety-three million, nine hundred thirty-nine thousand, two hundred thirty-one".