117985 has 8 divisors (see below), whose sum is σ = 161856. Its totient is φ = 80880.

The previous prime is 117979. The next prime is 117989. The reversal of 117985 is 589711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 117985 - 2³ = 117977 is a prime.

It is an Ulam number.

It is a Duffinian number.

117985 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (117989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1651 + ... + 1720.

It is an arithmetic number, because the mean of its divisors is an integer number (20232).

2¹¹⁷⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

117985 is a deficient number, since it is larger than the sum of its proper divisors (43871).

117985 is an equidigital number, since it uses as much as digits as its factorization.

117985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3383.

The product of its digits is 2520, while the sum is 31.

The square root of 117985 is about 343.4894467083. The cubic root of 117985 is about 49.0466028932.

The spelling of 117985 in words is "one hundred seventeen thousand, nine hundred eighty-five".