131623573 has 4 divisors (see below), whose sum is σ = 131689260. Its totient is φ = 131557888.

The previous prime is 131623561. The next prime is 131623601. The reversal of 131623573 is 375326131.

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 45468049 + 86155524 = 6743^2 + 9282^2 .

It is a cyclic number.

It is not a de Polignac number, because 131623573 - 2¹³ = 131615381 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 (131624573) 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, 29740 + ... + 33877.

It is an arithmetic number, because the mean of its divisors is an integer number (32922315).

Almost surely, 2^131623573 is an apocalyptic number.

It is an amenable number.

131623573 is a deficient number, since it is larger than the sum of its proper divisors (65687).

131623573 is an equidigital number, since it uses as much as digits as its factorization.

131623573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65686.

The product of its digits is 11340, while the sum is 31.

The square root of 131623573 is about 11472.7317148097. The cubic root of 131623573 is about 508.6798781706.

The spelling of 131623573 in words is "one hundred thirty-one million, six hundred twenty-three thousand, five hundred seventy-three".