118299991 has 4 divisors (see below), whose sum is σ = 125258832. Its totient is φ = 111341152.

The previous prime is 118299967. The next prime is 118299997. The reversal of 118299991 is 199992811.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 118299991 - 2⁵ = 118299959 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118299997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3479395 + ... + 3479428.

It is an arithmetic number, because the mean of its divisors is an integer number (31314708).

Almost surely, 2^118299991 is an apocalyptic number.

118299991 is a deficient number, since it is larger than the sum of its proper divisors (6958841).

118299991 is an equidigital number, since it uses as much as digits as its factorization.

118299991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6958840.

The product of its digits is 104976, while the sum is 49.

The square root of 118299991 is about 10876.5799312100. The cubic root of 118299991 is about 490.9021157310.

The spelling of 118299991 in words is "one hundred eighteen million, two hundred ninety-nine thousand, nine hundred ninety-one".