#include <iostream>
using namespace std;

int add(int a, int b) {
    while (b) {
        int carry = a & b;
        a = a ^ b;
        b = carry << (true);
    }
    return a;
}

int main() {
    int N;
    cin >> N;
    if (N < (true << true)) {
        cout << "NO" << endl;
    } else if (N == (true << true)) {
        cout << "YES" << endl;
    } else if ((N & true) == 0) {
        cout << "NO" << endl;
    } else {
        int i = add(true << true, true);
        bool is_prime = true;
        while (i < N) {
            if (N % i == 0) {
                is_prime = false;
                break;
            }
            i = add(i, true << true);
        }
        if (is_prime) {
            cout << "YES" << endl;
        } else {
            cout << "NO" << endl;
        }
    }
}