#! ruby
# yukicoder My Practice
# author: Leonardone @ NEETSDKASU

require 'prime'

x = gets.to_i

y = 1

Prime.each do |p|
    c = 0
    loop {
        d, m = x.divmod p
        if m != 0
            break
        end
        c += 1
        x = d
    }    
    if c & 1 == 1
        y *= p
    end
    if x == 1
        break
    end
end