85711 has 2 divisors, whose sum is σ = 85712.
Its totient is φ = 85710.
The previous prime is 85703. The next prime is 85717. The reversal of 85711 is 11758.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 85711 - 23 = 85703 is a prime.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (85717) 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 as a sum of consecutive naturals, namely, 42855 + 42856.
It is an arithmetic number, because the mean of its divisors is an integer number (42856).
285711 is an apocalyptic number.
85711 is a deficient number, since it is larger than the sum of its proper divisors (1).
85711 is an equidigital number, since it uses as much as digits as its factorization.
85711 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 280, while the sum is 22.
The square root of 85711 is about 292.7644104054.
The cubic root of 85711 is about 44.0905504372.
It can be divided in two parts, 857 and 11, that added together give a palindrome (868).
The spelling of 85711 in words is "eighty-five thousand, seven hundred eleven".