85859 has 4 divisors (see below), whose sum is σ = 89616. Its totient is φ = 82104.

The previous prime is 85853. The next prime is 85889. The reversal of 85859 is 95858.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85859 - 2⁴ = 85843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85853) 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, 1844 + ... + 1889.

It is an arithmetic number, because the mean of its divisors is an integer number (22404).

2⁸⁵⁸⁵⁹ is an apocalyptic number.

85859 is a deficient number, since it is larger than the sum of its proper divisors (3757).

85859 is a wasteful number, since it uses less digits than its factorization.

85859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3756.

The product of its digits is 14400, while the sum is 35.

The square root of 85859 is about 293.0170643495. The cubic root of 85859 is about 44.1159133785.

Subtracting 85859 from its reverse (95858), we obtain a palindrome (9999).

The spelling of 85859 in words is "eighty-five thousand, eight hundred fifty-nine".