118601891 has 2 divisors, whose sum is σ = 118601892. Its totient is φ = 118601890.

The previous prime is 118601887. The next prime is 118601927. The reversal of 118601891 is 198106811.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 118601891 - 2² = 118601887 is a prime.

It is not a weakly prime, because it can be changed into another prime (118601801) 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 as a sum of consecutive naturals, namely, 59300945 + 59300946.

It is an arithmetic number, because the mean of its divisors is an integer number (59300946).

Almost surely, 2^118601891 is an apocalyptic number.

118601891 is a deficient number, since it is larger than the sum of its proper divisors (1).

118601891 is an equidigital number, since it uses as much as digits as its factorization.

118601891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 35.

The square root of 118601891 is about 10890.4495315850. The cubic root of 118601891 is about 491.3193528892.

The spelling of 118601891 in words is "one hundred eighteen million, six hundred one thousand, eight hundred ninety-one".