117918 has 12 divisors (see below), whose sum is σ = 255528. Its totient is φ = 39300.

The previous prime is 117917. The next prime is 117937. The reversal of 117918 is 819711.

It is a junction number, because it is equal to n+sod(n) for n = 117891 and 117900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3258 + ... + 3293.

It is an arithmetic number, because the mean of its divisors is an integer number (21294).

2¹¹⁷⁹¹⁸ is an apocalyptic number.

117918 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

117918 is an abundant number, since it is smaller than the sum of its proper divisors (137610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

117918 is a wasteful number, since it uses less digits than its factorization.

117918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6559 (or 6556 counting only the distinct ones).

The product of its digits is 504, while the sum is 27.

The square root of 117918 is about 343.3919043891. The cubic root of 117918 is about 49.0373171235.

It can be divided in two parts, 117 and 918, that added together give a triangular number (1035 = T₄₅).

The spelling of 117918 in words is "one hundred seventeen thousand, nine hundred eighteen".