131142997 has 6 divisors (see below), whose sum is σ = 138408918. Its totient is φ = 124240392.

The previous prime is 131142971. The next prime is 131143003. The reversal of 131142997 is 799241131.

It can be written as a sum of positive squares in only one way, i.e., 123965956 + 7177041 = 11134^2 + 2679^2 .

It is a de Polignac number, because none of the positive numbers 2^k-131142997 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 (131142917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 181278 + ... + 181999.

It is an arithmetic number, because the mean of its divisors is an integer number (23068153).

Almost surely, 2^131142997 is an apocalyptic number.

It is an amenable number.

131142997 is a deficient number, since it is larger than the sum of its proper divisors (7265921).

131142997 is an equidigital number, since it uses as much as digits as its factorization.

131142997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363315 (or 363296 counting only the distinct ones).

The product of its digits is 13608, while the sum is 37.

The square root of 131142997 is about 11451.7682914037. The cubic root of 131142997 is about 508.0600361497.

The spelling of 131142997 in words is "one hundred thirty-one million, one hundred forty-two thousand, nine hundred ninety-seven".