117980187 has 16 divisors (see below), whose sum is σ = 179373600. Its totient is φ = 68332032.

The previous prime is 117980167. The next prime is 117980201. The reversal of 117980187 is 781089711.

It is a happy number.

It is not a de Polignac number, because 117980187 - 2⁷ = 117980059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117980147) 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, 88312 + ... + 89637.

It is an arithmetic number, because the mean of its divisors is an integer number (11210850).

Almost surely, 2^117980187 is an apocalyptic number.

117980187 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

117980187 is a deficient number, since it is larger than the sum of its proper divisors (61393413).

117980187 is a wasteful number, since it uses less digits than its factorization.

117980187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177982.

The product of its (nonzero) digits is 28224, while the sum is 42.

The square root of 117980187 is about 10861.8684856704. The cubic root of 117980187 is about 490.4593595954.

The spelling of 117980187 in words is "one hundred seventeen million, nine hundred eighty thousand, one hundred eighty-seven".