231117937 has 4 divisors (see below), whose sum is σ = 231577920. Its totient is φ = 230657956.

The previous prime is 231117857. The next prime is 231117949. The reversal of 231117937 is 739711132.

231117937 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231117937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231117977) 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, 229237 + ... + 230242.

It is an arithmetic number, because the mean of its divisors is an integer number (57894480).

Almost surely, 2^231117937 is an apocalyptic number.

It is an amenable number.

231117937 is a deficient number, since it is larger than the sum of its proper divisors (459983).

231117937 is an equidigital number, since it uses as much as digits as its factorization.

231117937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459982.

The product of its digits is 7938, while the sum is 34.

The square root of 231117937 is about 15202.5635009363. The cubic root of 231117937 is about 613.6836471173.

The spelling of 231117937 in words is "two hundred thirty-one million, one hundred seventeen thousand, nine hundred thirty-seven".