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

int main() {
	long long N;
	cin >> N;
	int cnt = 0;
	for(long long i = 2; i * i <= N; i++) {
		if(N % i == 0) {
			while(N % i == 0) N /= i;
			cnt++;
		}
	}
	if(N != 1) cnt++;
	if(cnt <= 2) cout << "Yes" << endl;
	else cout << "No" << endl;
}