109108091 has 4 divisors (see below), whose sum is σ = 115526232. Its totient is φ = 102689952.

The previous prime is 109108073. The next prime is 109108099. The reversal of 109108091 is 190801901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190801901 = 593 ⋅321757.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109108091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109108099) 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, 3209045 + ... + 3209078.

It is an arithmetic number, because the mean of its divisors is an integer number (28881558).

Almost surely, 2^109108091 is an apocalyptic number.

109108091 is a deficient number, since it is larger than the sum of its proper divisors (6418141).

109108091 is an equidigital number, since it uses as much as digits as its factorization.

109108091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6418140.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 109108091 is about 10445.4818462338. The cubic root of 109108091 is about 477.8434665986.

Adding to 109108091 its reverse (190801901), we get a palindrome (299909992).

The spelling of 109108091 in words is "one hundred nine million, one hundred eight thousand, ninety-one".