85719 has 4 divisors (see below), whose sum is σ = 114296.
Its totient is φ = 57144.
The previous prime is 85717. The next prime is 85733. The reversal of 85719 is 91758.
It is a semiprime because it is the product of two primes.
It is not a de Polignac number, because 85719 - 21 = 85717 is a prime.
It is a super-2 number, since 2×857192 = 14695493922, which contains 22 as substring.
It is a D-number.
It is a Duffinian number.
It is a plaindrome in base 14.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (85711) 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, 14284 + ... + 14289.
It is an arithmetic number, because the mean of its divisors is an integer number (28574).
285719 is an apocalyptic number.
85719 is a deficient number, since it is larger than the sum of its proper divisors (28577).
85719 is a wasteful number, since it uses less digits than its factorization.
85719 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 28576.
The product of its digits is 2520, while the sum is 30.
The square root of 85719 is about 292.7780729495.
The cubic root of 85719 is about 44.0919221531.
The spelling of 85719 in words is "eighty-five thousand, seven hundred nineteen".