118383891 has 4 divisors (see below), whose sum is σ = 157845192. Its totient is φ = 78922592.

The previous prime is 118383883. The next prime is 118383893. The reversal of 118383891 is 198383811.

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 118383891 - 2³ = 118383883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (118383893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19730646 + ... + 19730651.

It is an arithmetic number, because the mean of its divisors is an integer number (39461298).

Almost surely, 2^118383891 is an apocalyptic number.

118383891 is a deficient number, since it is larger than the sum of its proper divisors (39461301).

118383891 is an equidigital number, since it uses as much as digits as its factorization.

118383891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39461300.

The product of its digits is 41472, while the sum is 42.

The square root of 118383891 is about 10880.4361585370. The cubic root of 118383891 is about 491.0181398441.

The spelling of 118383891 in words is "one hundred eighteen million, three hundred eighty-three thousand, eight hundred ninety-one".