118614991 has 16 divisors (see below), whose sum is σ = 132094080. Its totient is φ = 105605280.

The previous prime is 118614989. The next prime is 118614997. The reversal of 118614991 is 199416811.

It is not a de Polignac number, because 118614991 - 2¹ = 118614989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118614997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166945 + ... + 167653.

It is an arithmetic number, because the mean of its divisors is an integer number (8255880).

Almost surely, 2^118614991 is an apocalyptic number.

118614991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

118614991 is a deficient number, since it is larger than the sum of its proper divisors (13479089).

118614991 is a wasteful number, since it uses less digits than its factorization.

118614991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014.

The product of its digits is 15552, while the sum is 40.

The square root of 118614991 is about 10891.0509593886. The cubic root of 118614991 is about 491.3374415456.

The spelling of 118614991 in words is "one hundred eighteen million, six hundred fourteen thousand, nine hundred ninety-one".