118491911 has 4 divisors (see below), whose sum is σ = 118518792. Its totient is φ = 118465032.

The previous prime is 118491881. The next prime is 118491931. The reversal of 118491911 is 119194811.

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 118491911 - 2¹⁰ = 118490887 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 (118491931) 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, 5105 + ... + 16218.

It is an arithmetic number, because the mean of its divisors is an integer number (29629698).

Almost surely, 2^118491911 is an apocalyptic number.

118491911 is a deficient number, since it is larger than the sum of its proper divisors (26881).

118491911 is an equidigital number, since it uses as much as digits as its factorization.

118491911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26880.

The product of its digits is 2592, while the sum is 35.

The square root of 118491911 is about 10885.3989821228. The cubic root of 118491911 is about 491.1674384665.

The spelling of 118491911 in words is "one hundred eighteen million, four hundred ninety-one thousand, nine hundred eleven".