108291 has 4 divisors (see below), whose sum is σ = 144392. Its totient is φ = 72192.

The previous prime is 108289. The next prime is 108293. The reversal of 108291 is 192801.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (108289) and next prime (108293).

It is not a de Polignac number, because 108291 - 2¹ = 108289 is a prime.

It is a D-number.

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 108291.

It is not an unprimeable number, because it can be changed into a prime (108293) 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, 18046 + ... + 18051.

It is an arithmetic number, because the mean of its divisors is an integer number (36098).

2¹⁰⁸²⁹¹ is an apocalyptic number.

108291 is a deficient number, since it is larger than the sum of its proper divisors (36101).

108291 is an equidigital number, since it uses as much as digits as its factorization.

108291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36100.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 108291 is about 329.0759790687. The cubic root of 108291 is about 47.6647648406.

The spelling of 108291 in words is "one hundred eight thousand, two hundred ninety-one".