117557091 has 12 divisors (see below), whose sum is σ = 179793432. Its totient is φ = 73761216.

The previous prime is 117557081. The next prime is 117557131. The reversal of 117557091 is 190755711.

117557091 is a `hidden beast` number, since 1 + 17 + 557 + 0 + 91 = 666.

It is not a de Polignac number, because 117557091 - 2²³ = 109168483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117557051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 384021 + ... + 384326.

It is an arithmetic number, because the mean of its divisors is an integer number (14982786).

Almost surely, 2^117557091 is an apocalyptic number.

117557091 is a deficient number, since it is larger than the sum of its proper divisors (62236341).

117557091 is a wasteful number, since it uses less digits than its factorization.

117557091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768370 (or 768367 counting only the distinct ones).

The product of its (nonzero) digits is 11025, while the sum is 36.

The square root of 117557091 is about 10842.3747859959. The cubic root of 117557091 is about 489.8723685355.

The spelling of 117557091 in words is "one hundred seventeen million, five hundred fifty-seven thousand, ninety-one".