131403173 has 4 divisors (see below), whose sum is σ = 143348928. Its totient is φ = 119457420.

The previous prime is 131403143. The next prime is 131403253. The reversal of 131403173 is 371304131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 371304131 = 11 ⋅33754921.

It is a cyclic number.

It is not a de Polignac number, because 131403173 - 2⁶ = 131403109 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 (131403113) 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, 5972861 + ... + 5972882.

It is an arithmetic number, because the mean of its divisors is an integer number (35837232).

Almost surely, 2^131403173 is an apocalyptic number.

It is an amenable number.

131403173 is a deficient number, since it is larger than the sum of its proper divisors (11945755).

131403173 is a wasteful number, since it uses less digits than its factorization.

131403173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11945754.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 131403173 is about 11463.1223058990. The cubic root of 131403173 is about 508.3957961286.

It can be divided in two parts, 131 and 403173, that added together give a palindrome (403304).

The spelling of 131403173 in words is "one hundred thirty-one million, four hundred three thousand, one hundred seventy-three".