109171143 has 12 divisors (see below), whose sum is σ = 157896648. Its totient is φ = 72686160.

The previous prime is 109171141. The next prime is 109171147. The reversal of 109171143 is 341171901.

It is not a de Polignac number, because 109171143 - 2¹ = 109171141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109171141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180 + ... + 14777.

It is an arithmetic number, because the mean of its divisors is an integer number (13158054).

Almost surely, 2^109171143 is an apocalyptic number.

109171143 is a deficient number, since it is larger than the sum of its proper divisors (48725505).

109171143 is a wasteful number, since it uses less digits than its factorization.

109171143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15774 (or 15771 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 109171143 is about 10448.4995573527. The cubic root of 109171143 is about 477.9354951675.

The spelling of 109171143 in words is "one hundred nine million, one hundred seventy-one thousand, one hundred forty-three".