import java.util.Scanner;

public class N300
{
	public static void main(String[] args)
	{
		Scanner sc = new Scanner(System.in);
		long x=sc.nextLong();
		long ans=1;
		while(x!=1)
		{
			int br=0;
			for(int i=2;i<=(int)Math.sqrt(x);i++)
			{
				if(x%i==0){ans=(ans%i==0)?ans/i:ans*i;x/=i;br++;break;}
			}
			if(br==0){ans=(ans%x==0)?ans/x:ans*x;break;}

		}
		System.out.println(ans);
	}
}