113191 has 4 divisors (see below), whose sum is σ = 121912. Its totient is φ = 104472.

The previous prime is 113189. The next prime is 113209. The reversal of 113191 is 191311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191311 = 19 ⋅10069.

It is a cyclic number.

It is not a de Polignac number, because 113191 - 2¹ = 113189 is a prime.

It is a Duffinian number.

113191 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113111) 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, 4341 + ... + 4366.

It is an arithmetic number, because the mean of its divisors is an integer number (30478).

2¹¹³¹⁹¹ is an apocalyptic number.

113191 is a deficient number, since it is larger than the sum of its proper divisors (8721).

113191 is an equidigital number, since it uses as much as digits as its factorization.

113191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8720.

The product of its digits is 27, while the sum is 16.

The square root of 113191 is about 336.4387016976. The cubic root of 113191 is about 48.3731050632.

The spelling of 113191 in words is "one hundred thirteen thousand, one hundred ninety-one".