131072173 has 4 divisors (see below), whose sum is σ = 132274780. Its totient is φ = 129869568.

The previous prime is 131072113. The next prime is 131072191. The reversal of 131072173 is 371270131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75986089 + 55086084 = 8717^2 + 7422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131072173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131072113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601140 + ... + 601357.

It is an arithmetic number, because the mean of its divisors is an integer number (33068695).

Almost surely, 2^131072173 is an apocalyptic number.

It is an amenable number.

131072173 is a deficient number, since it is larger than the sum of its proper divisors (1202607).

131072173 is a wasteful number, since it uses less digits than its factorization.

131072173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202606.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 131072173 is about 11448.6756002605. The cubic root of 131072173 is about 507.9685601164.

The spelling of 131072173 in words is "one hundred thirty-one million, seventy-two thousand, one hundred seventy-three".