131705567957 has 2 divisors, whose sum is σ = 131705567958. Its totient is φ = 131705567956.

The previous prime is 131705567947. The next prime is 131705568023. The reversal of 131705567957 is 759765507131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76374296881 + 55331271076 = 276359^2 + 235226^2 .

It is a cyclic number.

It is not a de Polignac number, because 131705567957 - 2⁴ = 131705567941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131705567947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65852783978 + 65852783979.

It is an arithmetic number, because the mean of its divisors is an integer number (65852783979).

Almost surely, 2^131705567957 is an apocalyptic number.

It is an amenable number.

131705567957 is a deficient number, since it is larger than the sum of its proper divisors (1).

131705567957 is an equidigital number, since it uses as much as digits as its factorization.

131705567957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6945750, while the sum is 56.

The spelling of 131705567957 in words is "one hundred thirty-one billion, seven hundred five million, five hundred sixty-seven thousand, nine hundred fifty-seven".