109109187 has 24 divisors (see below), whose sum is σ = 178301760. Its totient is φ = 66125160.

The previous prime is 109109177. The next prime is 109109201. The reversal of 109109187 is 781901901.

It is not a de Polignac number, because 109109187 - 2¹⁰ = 109108163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109109167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17737 + ... + 23082.

It is an arithmetic number, because the mean of its divisors is an integer number (7429240).

Almost surely, 2^109109187 is an apocalyptic number.

109109187 is a deficient number, since it is larger than the sum of its proper divisors (69192573).

109109187 is an equidigital number, since it uses as much as digits as its factorization.

109109187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40845 (or 40833 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 36.

The square root of 109109187 is about 10445.5343089763. The cubic root of 109109187 is about 477.8450665859.

The spelling of 109109187 in words is "one hundred nine million, one hundred nine thousand, one hundred eighty-seven".