85786376917 has 2 divisors, whose sum is σ = 85786376918. Its totient is φ = 85786376916.

The previous prime is 85786376861. The next prime is 85786376947. The reversal of 85786376917 is 71967368758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57468555076 + 28317821841 = 239726^2 + 168279^2 .

It is a cyclic number.

It is not a de Polignac number, because 85786376917 - 2²⁷ = 85652159189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85786376947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42893188458 + 42893188459.

It is an arithmetic number, because the mean of its divisors is an integer number (42893188459).

Almost surely, 2^85786376917 is an apocalyptic number.

It is an amenable number.

85786376917 is a deficient number, since it is larger than the sum of its proper divisors (1).

85786376917 is an equidigital number, since it uses as much as digits as its factorization.

85786376917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 106686720, while the sum is 67.

The spelling of 85786376917 in words is "eighty-five billion, seven hundred eighty-six million, three hundred seventy-six thousand, nine hundred seventeen".