131791197 has 12 divisors (see below), whose sum is σ = 177999360. Its totient is φ = 86736312.

The previous prime is 131791193. The next prime is 131791229. The reversal of 131791197 is 791197131.

It is not a de Polignac number, because 131791197 - 2² = 131791193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131791193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15204 + ... + 22242.

It is an arithmetic number, because the mean of its divisors is an integer number (14833280).

Almost surely, 2^131791197 is an apocalyptic number.

It is an amenable number.

131791197 is a deficient number, since it is larger than the sum of its proper divisors (46208163).

131791197 is an frugal number, since it uses more digits than its factorization.

131791197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7200 (or 7121 counting only the distinct ones).

The product of its digits is 11907, while the sum is 39.

The square root of 131791197 is about 11480.0347124911. The cubic root of 131791197 is about 508.8957229554.

The spelling of 131791197 in words is "one hundred thirty-one million, seven hundred ninety-one thousand, one hundred ninety-seven".