86681495317 has 2 divisors, whose sum is σ = 86681495318. Its totient is φ = 86681495316.

The previous prime is 86681495281. The next prime is 86681495323. The reversal of 86681495317 is 71359418668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63991797156 + 22689698161 = 252966^2 + 150631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86681495317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86681495917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43340747658 + 43340747659.

It is an arithmetic number, because the mean of its divisors is an integer number (43340747659).

Almost surely, 2^86681495317 is an apocalyptic number.

It is an amenable number.

86681495317 is a deficient number, since it is larger than the sum of its proper divisors (1).

86681495317 is an equidigital number, since it uses as much as digits as its factorization.

86681495317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 58.

The spelling of 86681495317 in words is "eighty-six billion, six hundred eighty-one million, four hundred ninety-five thousand, three hundred seventeen".