109192091 has 4 divisors (see below), whose sum is σ = 109214472. Its totient is φ = 109169712.

The previous prime is 109192081. The next prime is 109192099. The reversal of 109192091 is 190291901.

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 109192091 - 2²⁶ = 42083227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109192099) 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, 410 + ... + 14783.

It is an arithmetic number, because the mean of its divisors is an integer number (27303618).

Almost surely, 2^109192091 is an apocalyptic number.

109192091 is a deficient number, since it is larger than the sum of its proper divisors (22381).

109192091 is an equidigital number, since it uses as much as digits as its factorization.

109192091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22380.

The product of its (nonzero) digits is 1458, while the sum is 32.

The square root of 109192091 is about 10449.5019498539. The cubic root of 109192091 is about 477.9660623186.

The spelling of 109192091 in words is "one hundred nine million, one hundred ninety-two thousand, ninety-one".