117899161 has 16 divisors (see below), whose sum is σ = 126806400. Its totient is φ = 109289088.

The previous prime is 117899147. The next prime is 117899191. The reversal of 117899161 is 161998711.

It is a cyclic number.

It is not a de Polignac number, because 117899161 - 2⁵ = 117899129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117899141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 231375 + ... + 231883.

It is an arithmetic number, because the mean of its divisors is an integer number (7925400).

Almost surely, 2^117899161 is an apocalyptic number.

It is an amenable number.

117899161 is a deficient number, since it is larger than the sum of its proper divisors (8907239).

117899161 is a wasteful number, since it uses less digits than its factorization.

117899161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768.

The product of its digits is 27216, while the sum is 43.

The square root of 117899161 is about 10858.1380079643. The cubic root of 117899161 is about 490.3470552556.

The spelling of 117899161 in words is "one hundred seventeen million, eight hundred ninety-nine thousand, one hundred sixty-one".