#include <iostream>
#include <vector>
#include <cmath>
using namespace std;

int main() {
    int N;
    cin >> N;
    if (N == (string("a")).size()) {
        cout << "NO" << endl;
        return 0;
    }
    if (N == (string("aa")).size()) {
        cout << "YES" << endl;
        return 0;
    }
    if (N % (string("aa")).size() == 0) {
        cout << "NO" << endl;
        return 0;
    }
    vector<int> divisors = {
        (string("aaa")).size(),
        (string("aaaaa")).size(),
        (string("aaaaaaa")).size(),
        (string("aaaaaaaaa")).size(),
        (string("aaaaaaaaaaa")).size(),
        (string("aaaaaaaaaaaaa")).size(),
        (string("aaaaaaaaaaaaaaa")).size(),
        (string("aaaaaaaaaaaaaaaaa")).size(),
        (string("aaaaaaaaaaaaaaaaaaa")).size(),
        (string("aaaaaaaaaaaaaaaaaaaaa")).size(),
        (string("aaaaaaaaaaaaaaaaaaaaaaa")).size(),
        (string("aaaaaaaaaaaaaaaaaaaaaaaaa")).size(),
        (string("aaaaaaaaaaaaaaaaaaaaaaaaaaa")).size(),
        (string("aaaaaaaaaaaaaaaaaaaaaaaaaaaaa")).size(),
        (string("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")).size()
    };
    double limit = sqrt(N);
    for (int d : divisors) {
        if (d > limit) break;
        if (N % d == 0) {
            cout << "NO" << endl;
            return 0;
        }
    }
    cout << "YES" << endl;
    return 0;
}