131783140868917 has 2 divisors, whose sum is σ = 131783140868918. Its totient is φ = 131783140868916.

The previous prime is 131783140868867. The next prime is 131783140868947. The reversal of 131783140868917 is 719868041387131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87888262515876 + 43894878353041 = 9374874^2 + 6625321^2 .

It is a cyclic number.

It is not a de Polignac number, because 131783140868917 - 2⁷ = 131783140868789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131783140868947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65891570434458 + 65891570434459.

It is an arithmetic number, because the mean of its divisors is an integer number (65891570434459).

Almost surely, 2^{131783140868917} is an apocalyptic number.

It is an amenable number.

131783140868917 is a deficient number, since it is larger than the sum of its proper divisors (1).

131783140868917 is an equidigital number, since it uses as much as digits as its factorization.

131783140868917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48771072, while the sum is 67.

The spelling of 131783140868917 in words is "one hundred thirty-one trillion, seven hundred eighty-three billion, one hundred forty million, eight hundred sixty-eight thousand, nine hundred seventeen".