108091 has 4 divisors (see below), whose sum is σ = 113800. Its totient is φ = 102384.

The previous prime is 108089. The next prime is 108107. The reversal of 108091 is 190801.

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 108091 - 2¹ = 108089 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 5689 = 108091 / (1 + 0 + 8 + 0 + 9 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (108011) 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, 2826 + ... + 2863.

It is an arithmetic number, because the mean of its divisors is an integer number (28450).

2¹⁰⁸⁰⁹¹ is an apocalyptic number.

108091 is a deficient number, since it is larger than the sum of its proper divisors (5709).

108091 is an equidigital number, since it uses as much as digits as its factorization.

108091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5708.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 108091 is about 328.7719574416. The cubic root of 108091 is about 47.6354031278.

Adding to 108091 its reverse (190801), we get a palindrome (298892).

The spelling of 108091 in words is "one hundred eight thousand, ninety-one".