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

#define RREP(i,s,e) for (i = e-1; i >= s; i--)
#define rrep(i,n) RREP(i,0,n)
#define REP(i,s,e) for (i = s; i < e; i++)
#define rep(i,n) REP(i,0,n)
#define INF 1e8

typedef long long ll;

int main() {
    ll i, n;
    cin >> n;
    REP (i,2,sqrt(n)) {
        if (n % i == 0) {
            n /= i;
            REP (i,i,sqrt(n)+1) {
                if (n % i == 0) {
                    cout << "YES" << endl;
                    return 0;
                }
            }
            cout << "NO" << endl;
            return 0;
        }
    }
    cout << "NO" << endl;
    return 0;
}