117985139 has 8 divisors (see below), whose sum is σ = 118711152. Its totient is φ = 117262080.

The previous prime is 117985129. The next prime is 117985141. The reversal of 117985139 is 931589711.

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

It is a cyclic number.

It is not a de Polignac number, because 117985139 - 2¹² = 117981043 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 117985139.

It is not an unprimeable number, because it can be changed into a prime (117985129) 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, 225332 + ... + 225854.

It is an arithmetic number, because the mean of its divisors is an integer number (14838894).

Almost surely, 2^117985139 is an apocalyptic number.

117985139 is a deficient number, since it is larger than the sum of its proper divisors (726013).

117985139 is an equidigital number, since it uses as much as digits as its factorization.

117985139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477.

The product of its digits is 68040, while the sum is 44.

The square root of 117985139 is about 10862.0964366921. The cubic root of 117985139 is about 490.4662215407.

The spelling of 117985139 in words is "one hundred seventeen million, nine hundred eighty-five thousand, one hundred thirty-nine".