109191172 has 12 divisors (see below), whose sum is σ = 192460240. Its totient is φ = 54202536.

The previous prime is 109191169. The next prime is 109191179. The reversal of 109191172 is 271191901.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (109191179) 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, 97638 + ... + 98749.

Almost surely, 2^109191172 is an apocalyptic number.

It is an amenable number.

109191172 is a deficient number, since it is larger than the sum of its proper divisors (83269068).

109191172 is a wasteful number, since it uses less digits than its factorization.

109191172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196530 (or 196528 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 31.

The square root of 109191172 is about 10449.4579763737. The cubic root of 109191172 is about 477.9647214033.

The spelling of 109191172 in words is "one hundred nine million, one hundred ninety-one thousand, one hundred seventy-two".