85867 has 4 divisors (see below), whose sum is σ = 90936. Its totient is φ = 80800.

The previous prime is 85853. The next prime is 85889. The reversal of 85867 is 76858.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85867 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 (85817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2509 + ... + 2542.

It is an arithmetic number, because the mean of its divisors is an integer number (22734).

2⁸⁵⁸⁶⁷ is an apocalyptic number.

85867 is a deficient number, since it is larger than the sum of its proper divisors (5069).

85867 is a wasteful number, since it uses less digits than its factorization.

85867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5068.

The product of its digits is 13440, while the sum is 34.

The square root of 85867 is about 293.0307151136. The cubic root of 85867 is about 44.1172835177.

Subtracting from 85867 its product of digits (13440), we obtain a palindrome (72427).

Subtracting from 85867 its reverse (76858), we obtain a palindrome (9009).

The spelling of 85867 in words is "eighty-five thousand, eight hundred sixty-seven".