117691691 has 8 divisors (see below), whose sum is σ = 126883344. Its totient is φ = 108519840.

The previous prime is 117691669. The next prime is 117691699. The reversal of 117691691 is 196196711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117691691 - 2¹⁰ = 117690667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117691699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8840 + ... + 17706.

It is an arithmetic number, because the mean of its divisors is an integer number (15860418).

Almost surely, 2^117691691 is an apocalyptic number.

117691691 is a deficient number, since it is larger than the sum of its proper divisors (9191653).

117691691 is a wasteful number, since it uses less digits than its factorization.

117691691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9901.

The product of its digits is 20412, while the sum is 41.

The square root of 117691691 is about 10848.5801375111. The cubic root of 117691691 is about 490.0592611930.

The spelling of 117691691 in words is "one hundred seventeen million, six hundred ninety-one thousand, six hundred ninety-one".