191118 has 16 divisors (see below), whose sum is σ = 390096. Its totient is φ = 62400.

The previous prime is 191099. The next prime is 191119. The reversal of 191118 is 811191.

It is a junction number, because it is equal to n+sod(n) for n = 191094 and 191103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18 + ... + 618.

It is an arithmetic number, because the mean of its divisors is an integer number (24381).

2¹⁹¹¹¹⁸ is an apocalyptic number.

191118 is an abundant number, since it is smaller than the sum of its proper divisors (198978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191118 is a wasteful number, since it uses less digits than its factorization.

191118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659.

The product of its digits is 72, while the sum is 21.

The square root of 191118 is about 437.1704473086. The cubic root of 191118 is about 57.6015094126.

It can be divided in two parts, 1 and 91118, that added together give a palindrome (91119).

The spelling of 191118 in words is "one hundred ninety-one thousand, one hundred eighteen".