85659 has 8 divisors (see below), whose sum is σ = 130560. Its totient is φ = 48936.

The previous prime is 85643. The next prime is 85661. The reversal of 85659 is 95658.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85659 - 2⁴ = 85643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2019 + ... + 2060.

It is an arithmetic number, because the mean of its divisors is an integer number (16320).

2⁸⁵⁶⁵⁹ is an apocalyptic number.

85659 is a deficient number, since it is larger than the sum of its proper divisors (44901).

85659 is a wasteful number, since it uses less digits than its factorization.

85659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4089.

The product of its digits is 10800, while the sum is 33.

The square root of 85659 is about 292.6755883226. The cubic root of 85659 is about 44.0816322025.

Subtracting 85659 from its reverse (95658), we obtain a palindrome (9999).

The spelling of 85659 in words is "eighty-five thousand, six hundred fifty-nine".