85717 has 2 divisors, whose sum is σ = 85718. Its totient is φ = 85716.

The previous prime is 85711. The next prime is 85733. The reversal of 85717 is 71758.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62001 + 23716 = 249^2 + 154^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85717 is a prime.

It is a Chen prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42858 + 42859.

It is an arithmetic number, because the mean of its divisors is an integer number (42859).

2⁸⁵⁷¹⁷ is an apocalyptic number.

It is an amenable number.

85717 is a deficient number, since it is larger than the sum of its proper divisors (1).

85717 is an equidigital number, since it uses as much as digits as its factorization.

85717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1960, while the sum is 28.

The square root of 85717 is about 292.7746573732. The cubic root of 85717 is about 44.0915792321.

The spelling of 85717 in words is "eighty-five thousand, seven hundred seventeen".