131957371309 has 2 divisors, whose sum is σ = 131957371310. Its totient is φ = 131957371308.

The previous prime is 131957371303. The next prime is 131957371339. The reversal of 131957371309 is 903173759131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74969178025 + 56988193284 = 273805^2 + 238722^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131957371309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131957371303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65978685654 + 65978685655.

It is an arithmetic number, because the mean of its divisors is an integer number (65978685655).

Almost surely, 2^131957371309 is an apocalyptic number.

It is an amenable number.

131957371309 is a deficient number, since it is larger than the sum of its proper divisors (1).

131957371309 is an equidigital number, since it uses as much as digits as its factorization.

131957371309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 535815, while the sum is 49.

The spelling of 131957371309 in words is "one hundred thirty-one billion, nine hundred fifty-seven million, three hundred seventy-one thousand, three hundred nine".