109185923 has 16 divisors (see below), whose sum is σ = 137264640. Its totient is φ = 85072680.

The previous prime is 109185907. The next prime is 109185941. The reversal of 109185923 is 329581901.

It is not a de Polignac number, because 109185923 - 2⁴ = 109185907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109185943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3458 + ... + 15176.

It is an arithmetic number, because the mean of its divisors is an integer number (8579040).

Almost surely, 2^109185923 is an apocalyptic number.

109185923 is a deficient number, since it is larger than the sum of its proper divisors (28078717).

109185923 is an equidigital number, since it uses as much as digits as its factorization.

109185923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11759 (or 11737 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 109185923 is about 10449.2068120025. The cubic root of 109185923 is about 477.9570624293.

The spelling of 109185923 in words is "one hundred nine million, one hundred eighty-five thousand, nine hundred twenty-three".