118137985 has 16 divisors (see below), whose sum is σ = 165787776. Its totient is φ = 79123968.

The previous prime is 118137979. The next prime is 118138019. The reversal of 118137985 is 589731811.

It is a de Polignac number, because none of the positive numbers 2^k-118137985 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37744 + ... + 40753.

It is an arithmetic number, because the mean of its divisors is an integer number (10361736).

Almost surely, 2^118137985 is an apocalyptic number.

It is an amenable number.

118137985 is a deficient number, since it is larger than the sum of its proper divisors (47649791).

118137985 is an equidigital number, since it uses as much as digits as its factorization.

118137985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78552.

The product of its digits is 60480, while the sum is 43.

The square root of 118137985 is about 10869.1299099790. The cubic root of 118137985 is about 490.6779246192.

The spelling of 118137985 in words is "one hundred eighteen million, one hundred thirty-seven thousand, nine hundred eighty-five".