131342791 has 4 divisors (see below), whose sum is σ = 133569000. Its totient is φ = 129116584.

The previous prime is 131342789. The next prime is 131342797. The reversal of 131342791 is 197243131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131342791 - 2¹ = 131342789 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 (131342797) 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, 1113016 + ... + 1113133.

It is an arithmetic number, because the mean of its divisors is an integer number (33392250).

Almost surely, 2^131342791 is an apocalyptic number.

131342791 is a deficient number, since it is larger than the sum of its proper divisors (2226209).

131342791 is an equidigital number, since it uses as much as digits as its factorization.

131342791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2226208.

The product of its digits is 4536, while the sum is 31.

The square root of 131342791 is about 11460.4882531243. The cubic root of 131342791 is about 508.3179120169.

The spelling of 131342791 in words is "one hundred thirty-one million, three hundred forty-two thousand, seven hundred ninety-one".