131705189 has 12 divisors (see below), whose sum is σ = 167136768. Its totient is φ = 102627000.

The previous prime is 131705179. The next prime is 131705201. The reversal of 131705189 is 981507131.

It is not a de Polignac number, because 131705189 - 2²⁰ = 130656613 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131705129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121637 + ... + 122714.

It is an arithmetic number, because the mean of its divisors is an integer number (13928064).

Almost surely, 2^131705189 is an apocalyptic number.

It is an amenable number.

131705189 is a deficient number, since it is larger than the sum of its proper divisors (35431579).

131705189 is a wasteful number, since it uses less digits than its factorization.

131705189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244376 (or 244369 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 35.

The square root of 131705189 is about 11476.2881194226. The cubic root of 131705189 is about 508.7849957112.

The spelling of 131705189 in words is "one hundred thirty-one million, seven hundred five thousand, one hundred eighty-nine".