231657937 has 12 divisors (see below), whose sum is σ = 283663920. Its totient is φ = 188112456.

The previous prime is 231657919. The next prime is 231657949. The reversal of 231657937 is 739756132.

It is a happy number.

It is not a de Polignac number, because 231657937 - 2¹⁵ = 231625169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231657893 and 231657902.

It is not an unprimeable number, because it can be changed into a prime (231657967) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 123483 + ... + 125344.

It is an arithmetic number, because the mean of its divisors is an integer number (23638660).

Almost surely, 2^231657937 is an apocalyptic number.

It is an amenable number.

231657937 is a deficient number, since it is larger than the sum of its proper divisors (52005983).

231657937 is a wasteful number, since it uses less digits than its factorization.

231657937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248860 (or 248853 counting only the distinct ones).

The product of its digits is 238140, while the sum is 43.

The square root of 231657937 is about 15220.3133016374. The cubic root of 231657937 is about 614.1612263923.

The spelling of 231657937 in words is "two hundred thirty-one million, six hundred fifty-seven thousand, nine hundred thirty-seven".