131376115309 has 2 divisors, whose sum is σ = 131376115310. Its totient is φ = 131376115308.

The previous prime is 131376115307. The next prime is 131376115319. The reversal of 131376115309 is 903511673131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94462178409 + 36913936900 = 307347^2 + 192130^2 .

It is a cyclic number.

It is not a de Polignac number, because 131376115309 - 2¹ = 131376115307 is a prime.

Together with 131376115307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131376115307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65688057654 + 65688057655.

It is an arithmetic number, because the mean of its divisors is an integer number (65688057655).

Almost surely, 2^131376115309 is an apocalyptic number.

It is an amenable number.

131376115309 is a deficient number, since it is larger than the sum of its proper divisors (1).

131376115309 is an equidigital number, since it uses as much as digits as its factorization.

131376115309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 40.

The spelling of 131376115309 in words is "one hundred thirty-one billion, three hundred seventy-six million, one hundred fifteen thousand, three hundred nine".