85539 has 4 divisors (see below), whose sum is σ = 114056. Its totient is φ = 57024.
The previous prime is 85531. The next prime is 85549. The reversal of 85539 is 93558.
It is a semiprime because it is the product of two primes.
It is not a de Polignac number, because 85539 - 23 = 85531 is a prime.
It is a super-3 number, since 3×855393 = 1877646193337457, which contains 333 as substring.
It is a D-number.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (85531) 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, 14254 + ... + 14259.
It is an arithmetic number, because the mean of its divisors is an integer number (28514).
285539 is an apocalyptic number.
85539 is a deficient number, since it is larger than the sum of its proper divisors (28517).
85539 is a wasteful number, since it uses less digits than its factorization.
85539 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 28516.
The product of its digits is 5400, while the sum is 30.
The square root of 85539 is about 292.4705113340. The cubic root of 85539 is about 44.0610378771.
The spelling of 85539 in words is "eighty-five thousand, five hundred thirty-nine".
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