117166991 has 8 divisors (see below), whose sum is σ = 122403840. Its totient is φ = 111942072.

The previous prime is 117166967. The next prime is 117166993. The reversal of 117166991 is 199661711.

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

It is a cyclic number.

It is not a de Polignac number, because 117166991 - 2⁶ = 117166927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117166993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21446 + ... + 26348.

It is an arithmetic number, because the mean of its divisors is an integer number (15300480).

Almost surely, 2^117166991 is an apocalyptic number.

117166991 is a deficient number, since it is larger than the sum of its proper divisors (5236849).

117166991 is a wasteful number, since it uses less digits than its factorization.

117166991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5965.

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

The square root of 117166991 is about 10824.3702357227. The cubic root of 117166991 is about 489.3299059177.

The spelling of 117166991 in words is "one hundred seventeen million, one hundred sixty-six thousand, nine hundred ninety-one".