#include <stdio.h>
#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 4000000000000000001



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