117889989 has 16 divisors (see below), whose sum is σ = 181389312. Its totient is φ = 66710448.

The previous prime is 117889979. The next prime is 117889991. The reversal of 117889989 is 989988711.

It is not a de Polignac number, because 117889989 - 2⁵ = 117889957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117889979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25089 + ... + 29414.

It is an arithmetic number, because the mean of its divisors is an integer number (11336832).

Almost surely, 2^117889989 is an apocalyptic number.

It is an amenable number.

117889989 is a deficient number, since it is larger than the sum of its proper divisors (63499323).

117889989 is a wasteful number, since it uses less digits than its factorization.

117889989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54616.

The product of its digits is 2612736, while the sum is 60.

The square root of 117889989 is about 10857.7156437254. The cubic root of 117889989 is about 490.3343393612.

The spelling of 117889989 in words is "one hundred seventeen million, eight hundred eighty-nine thousand, nine hundred eighty-nine".