#include <iostream>
using namespace std;

int n;
int zero = false, one = true, two = (one << true);

int inc(int i) {
    int k = one;
    if (!(i & k)) return i | k;
    while (i & k) {
        i ^= k;
        k <<= one;
    }
    i ^= k;
    return i;
}

bool solve() {
    if (n == one) return false;
    if (n == two) return true;
    for (int i = two; i < n; i = inc(i)) {
        if (n % i == zero)
            return false;
    }
    return true;
}

void input() {
    cin >> n;
}

int main() {
    input();
    cout << (solve()?"YES":"NO") << endl;
}