131347493 has 2 divisors, whose sum is σ = 131347494. Its totient is φ = 131347492.

The previous prime is 131347451. The next prime is 131347553. The reversal of 131347493 is 394743131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101949409 + 29398084 = 10097^2 + 5422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131347493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131347793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65673746 + 65673747.

It is an arithmetic number, because the mean of its divisors is an integer number (65673747).

Almost surely, 2^131347493 is an apocalyptic number.

It is an amenable number.

131347493 is a deficient number, since it is larger than the sum of its proper divisors (1).

131347493 is an equidigital number, since it uses as much as digits as its factorization.

131347493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 35.

The square root of 131347493 is about 11460.6933908904. The cubic root of 131347493 is about 508.3239777788.

The spelling of 131347493 in words is "one hundred thirty-one million, three hundred forty-seven thousand, four hundred ninety-three".