117657657 has 16 divisors (see below), whose sum is σ = 187716480. Its totient is φ = 72404496.

The previous prime is 117657653. The next prime is 117657737. The reversal of 117657657 is 756756711.

117657657 is a `hidden beast` number, since 1 + 1 + 76 + 576 + 5 + 7 = 666.

It is not a de Polignac number, because 117657657 - 2² = 117657653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117657653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167253 + ... + 167954.

It is an arithmetic number, because the mean of its divisors is an integer number (11732280).

Almost surely, 2^117657657 is an apocalyptic number.

It is an amenable number.

117657657 is a deficient number, since it is larger than the sum of its proper divisors (70058823).

117657657 is a wasteful number, since it uses less digits than its factorization.

117657657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335229 (or 335223 counting only the distinct ones).

The product of its digits is 308700, while the sum is 45.

The square root of 117657657 is about 10847.0114317263. The cubic root of 117657657 is about 490.0120183086.

The spelling of 117657657 in words is "one hundred seventeen million, six hundred fifty-seven thousand, six hundred fifty-seven".