118381689 has 8 divisors (see below), whose sum is σ = 175380320. Its totient is φ = 78921108.

The previous prime is 118381661. The next prime is 118381721. The reversal of 118381689 is 986183811.

It is not a de Polignac number, because 118381689 - 2⁵ = 118381657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118381639) 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, 2192227 + ... + 2192280.

It is an arithmetic number, because the mean of its divisors is an integer number (21922540).

Almost surely, 2^118381689 is an apocalyptic number.

It is an amenable number.

118381689 is a deficient number, since it is larger than the sum of its proper divisors (56998631).

118381689 is an equidigital number, since it uses as much as digits as its factorization.

118381689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4384516 (or 4384510 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 118381689 is about 10880.3349672701. The cubic root of 118381689 is about 491.0150954304.

The spelling of 118381689 in words is "one hundred eighteen million, three hundred eighty-one thousand, six hundred eighty-nine".