using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Text;
using System.Text.RegularExpressions;
using System.Linq;


class Magatro
{
    static void Main()
    {
        long X = long.Parse(Console.ReadLine());
        long ans = 1;
        for(int i = 2; i <= Math.Sqrt(X); i++)
        {
            if (X % i == 0)
            {
                int c = 0;
                while (X % i == 0)
                {
                    c++;
                    X /= i;
                }
                if (c % 2 == 1)
                {
                    ans *= i;
                }
            }
        }
        ans *= X;
        Console.WriteLine(ans);
    }
}