131706878813 has 2 divisors, whose sum is σ = 131706878814. Its totient is φ = 131706878812.

The previous prime is 131706878741. The next prime is 131706878857. The reversal of 131706878813 is 318878607131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109351246489 + 22355632324 = 330683^2 + 149518^2 .

It is a cyclic number.

It is not a de Polignac number, because 131706878813 - 2¹⁰ = 131706877789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131706878113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65853439406 + 65853439407.

It is an arithmetic number, because the mean of its divisors is an integer number (65853439407).

Almost surely, 2^131706878813 is an apocalyptic number.

It is an amenable number.

131706878813 is a deficient number, since it is larger than the sum of its proper divisors (1).

131706878813 is an equidigital number, since it uses as much as digits as its factorization.

131706878813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 131706878813 in words is "one hundred thirty-one billion, seven hundred six million, eight hundred seventy-eight thousand, eight hundred thirteen".