109191171 has 8 divisors (see below), whose sum is σ = 146735104. Its totient is φ = 72220680.

The previous prime is 109191169. The next prime is 109191179. The reversal of 109191171 is 171191901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 109191171 - 2¹ = 109191169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109191179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142915 + ... + 143676.

It is an arithmetic number, because the mean of its divisors is an integer number (18341888).

Almost surely, 2^109191171 is an apocalyptic number.

109191171 is a deficient number, since it is larger than the sum of its proper divisors (37543933).

109191171 is a wasteful number, since it uses less digits than its factorization.

109191171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286721.

The product of its (nonzero) digits is 567, while the sum is 30.

The square root of 109191171 is about 10449.4579285243. The cubic root of 109191171 is about 477.9647199442.

It can be divided in two parts, 10919 and 1171, that added together give a triangular number (12090 = T₁₅₅).

The spelling of 109191171 in words is "one hundred nine million, one hundred ninety-one thousand, one hundred seventy-one".