#include<bits/stdc++.h>
using namespace std;
using ll=long long;
using pii=pair<int,int>;

#define all(a) a.begin(),a.end()
#define pb push_back
#define sz(a) ((int)a.size())



signed main(){
    ios_base::sync_with_stdio(0),cin.tie(0);
    ll n; cin >> n;
    int cnt=0;
    for(int i=2; 1ll*i*i<=n; ++i) if(n%i==0){
        cnt++;
        while(n%i==0) n/=i;
    }
    if(n>1) cnt++;
    cout << (cnt<=2?"Yes":"No") << "\n";
}