118091 has 4 divisors (see below), whose sum is σ = 118800. Its totient is φ = 117384.

The previous prime is 118081. The next prime is 118093. The reversal of 118091 is 190811.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118091 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 118091.

It is not an unprimeable number, because it can be changed into a prime (118093) 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, 50 + ... + 488.

It is an arithmetic number, because the mean of its divisors is an integer number (29700).

2¹¹⁸⁰⁹¹ is an apocalyptic number.

118091 is a deficient number, since it is larger than the sum of its proper divisors (709).

118091 is an equidigital number, since it uses as much as digits as its factorization.

118091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 118091 is about 343.6437108402. The cubic root of 118091 is about 49.0612866348.

The spelling of 118091 in words is "one hundred eighteen thousand, ninety-one".