131973197 has 4 divisors (see below), whose sum is σ = 132007356. Its totient is φ = 131939040.

The previous prime is 131973181. The next prime is 131973203. The reversal of 131973197 is 791379131.

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 83795716 + 48177481 = 9154^2 + 6941^2 .

It is a cyclic number.

It is not a de Polignac number, because 131973197 - 2⁴ = 131973181 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 (131973097) 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, 10418 + ... + 19299.

It is an arithmetic number, because the mean of its divisors is an integer number (33001839).

Almost surely, 2^131973197 is an apocalyptic number.

It is an amenable number.

131973197 is a deficient number, since it is larger than the sum of its proper divisors (34159).

131973197 is an equidigital number, since it uses as much as digits as its factorization.

131973197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34158.

The product of its digits is 35721, while the sum is 41.

The square root of 131973197 is about 11487.9587830041. The cubic root of 131973197 is about 509.1298721793.

The spelling of 131973197 in words is "one hundred thirty-one million, nine hundred seventy-three thousand, one hundred ninety-seven".