#include <bits/stdc++.h>
using namespace std;

bool solve(int64_t N) {
	vector<int64_t> v;
    int64_t c = 1;
    int64_t limit = (int64_t)sqrt(N);
    int f = 0;
    while (c < limit) {
        c++;
        bool flag = true;
        int64_t d = (int)sqrt(c);
        for(int i = 0; i < v.size(); i++) {
        	if(c % v[i] == 0) {
        		flag = false;
        		break;
        	}
        	if (d < v[i]) break;
        }
        if(flag) {
        	v.push_back(c);
        	int64_t tmp = N;
        	while(tmp % c == 0) {
        		f++;
        		tmp /= c;
        	}
        	if(f >= 2) return true;
        }
    }
    return false;
}

int main() {
	int N;
	cin >> N;
	cout << (solve(N) ? "YES" : "NO") << endl;
	return 0;
}