131543597 has 4 divisors (see below), whose sum is σ = 131734656. Its totient is φ = 131352540.

The previous prime is 131543567. The next prime is 131543641. The reversal of 131543597 is 795345131.

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: 795345131 = 7 ⋅113620733.

It is a cyclic number.

It is not a de Polignac number, because 131543597 - 2¹² = 131539501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131543597.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131543527) 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, 94493 + ... + 95874.

It is an arithmetic number, because the mean of its divisors is an integer number (32933664).

Almost surely, 2^131543597 is an apocalyptic number.

It is an amenable number.

131543597 is a deficient number, since it is larger than the sum of its proper divisors (191059).

131543597 is an equidigital number, since it uses as much as digits as its factorization.

131543597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191058.

The product of its digits is 56700, while the sum is 38.

The square root of 131543597 is about 11469.2457031838. The cubic root of 131543597 is about 508.5768307112.

The spelling of 131543597 in words is "one hundred thirty-one million, five hundred forty-three thousand, five hundred ninety-seven".