85559 has 4 divisors (see below), whose sum is σ = 86904. Its totient is φ = 84216.

The previous prime is 85549. The next prime is 85571. The reversal of 85559 is 95558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95558 = 2 ⋅47779.

It is a cyclic number.

It is not a de Polignac number, because 85559 - 2⁸ = 85303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572 + ... + 705.

It is an arithmetic number, because the mean of its divisors is an integer number (21726).

2⁸⁵⁵⁵⁹ is an apocalyptic number.

85559 is a deficient number, since it is larger than the sum of its proper divisors (1345).

85559 is a wasteful number, since it uses less digits than its factorization.

85559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344.

The product of its digits is 9000, while the sum is 32.

The square root of 85559 is about 292.5047008169. The cubic root of 85559 is about 44.0644716017.

Subtracting 85559 from its reverse (95558), we obtain a palindrome (9999).

The spelling of 85559 in words is "eighty-five thousand, five hundred fifty-nine".