85939 has 4 divisors (see below), whose sum is σ = 98224. Its totient is φ = 73656.

The previous prime is 85933. The next prime is 85991. The reversal of 85939 is 93958.

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 85939 - 2³ = 85931 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (85931) 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, 6132 + ... + 6145.

It is an arithmetic number, because the mean of its divisors is an integer number (24556).

2⁸⁵⁹³⁹ is an apocalyptic number.

85939 is a deficient number, since it is larger than the sum of its proper divisors (12285).

85939 is a wasteful number, since it uses less digits than its factorization.

85939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12284.

The product of its digits is 9720, while the sum is 34.

The square root of 85939 is about 293.1535433864. The cubic root of 85939 is about 44.1296109427.

Subtracting from 85939 its sum of digits (34), we obtain a triangular number (85905 = T₄₁₄).

Adding to 85939 its product of digits (9720), we get a palindrome (95659).

It can be divided in two parts, 859 and 39, that added together give a palindrome (898).

The spelling of 85939 in words is "eighty-five thousand, nine hundred thirty-nine".