9137993231 has 2 divisors, whose sum is σ = 9137993232. Its totient is φ = 9137993230.

The previous prime is 9137993201. The next prime is 9137993233. The reversal of 9137993231 is 1323997319.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9137993231 - 2¹⁸ = 9137731087 is a prime.

It is a super-2 number, since 2×9137993231² (a number of 21 digits) contains 22 as substring.

Together with 9137993233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9137993233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4568996615 + 4568996616.

It is an arithmetic number, because the mean of its divisors is an integer number (4568996616).

Almost surely, 2^9137993231 is an apocalyptic number.

9137993231 is a deficient number, since it is larger than the sum of its proper divisors (1).

9137993231 is an equidigital number, since it uses as much as digits as its factorization.

9137993231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 275562, while the sum is 47.

The square root of 9137993231 is about 95592.8513592936. The cubic root of 9137993231 is about 2090.6609655992.

The spelling of 9137993231 in words is "nine billion, one hundred thirty-seven million, nine hundred ninety-three thousand, two hundred thirty-one".