import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Main main = new Main();
        Scanner scan = new Scanner(System.in);
        int number = scan.nextInt();
        System.out.println(main.isPrimeNumber(number));
    }

    public Boolean isPrimeNumber(int number) {
        boolean a =true;
        for(int i =2;i<number;i++){
            if(number%i==0){
                a=false;
                break;
            }
        }
        return a;
    }
}