117988871 has 24 divisors (see below), whose sum is σ = 159306624. Its totient is φ = 84857760.

The previous prime is 117988867. The next prime is 117988889. The reversal of 117988871 is 178889711.

It is not a de Polignac number, because 117988871 - 2² = 117988867 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 (117988831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8480 + ... + 17546.

It is an arithmetic number, because the mean of its divisors is an integer number (6637776).

Almost surely, 2^117988871 is an apocalyptic number.

117988871 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

117988871 is a deficient number, since it is larger than the sum of its proper divisors (41317753).

117988871 is a wasteful number, since it uses less digits than its factorization.

117988871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9111 (or 9098 counting only the distinct ones).

The product of its digits is 225792, while the sum is 50.

The square root of 117988871 is about 10862.2682253754. The cubic root of 117988871 is about 490.4713928152.

The spelling of 117988871 in words is "one hundred seventeen million, nine hundred eighty-eight thousand, eight hundred seventy-one".