115191657 has 12 divisors (see below), whose sum is σ = 190157760. Its totient is φ = 65823768.

The previous prime is 115191649. The next prime is 115191697. The reversal of 115191657 is 756191511.

It is not a de Polignac number, because 115191657 - 2³ = 115191649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115191617) 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, 914157 + ... + 914282.

It is an arithmetic number, because the mean of its divisors is an integer number (15846480).

Almost surely, 2^115191657 is an apocalyptic number.

It is an amenable number.

115191657 is a deficient number, since it is larger than the sum of its proper divisors (74966103).

115191657 is a wasteful number, since it uses less digits than its factorization.

115191657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828452 (or 1828449 counting only the distinct ones).

The product of its digits is 9450, while the sum is 36.

The square root of 115191657 is about 10732.7376283966. The cubic root of 115191657 is about 486.5644131097.

The spelling of 115191657 in words is "one hundred fifteen million, one hundred ninety-one thousand, six hundred fifty-seven".