#include <algorithm>
#include <bitset>
#include <complex>
#include <cassert>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <math.h>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#include<regex>
using namespace std;
using ll = long long;
using Graph = vector<vector<int>>;
#define rep(i,x) for(ll i=0;i<(ll)(x);i++)
#define rrep(i,x) for(ll i=1;i<=(ll)(x);i++)
#define all(v) v.begin(),v.end()
typedef pair<int, int> pii;
ll mod998 = 998244353;
ll mod109 = 1e9 + 7;
//vector<vector<int>> a(n,vector<int>(n));

int main(){

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