#include <bits/stdc++.h>

using namespace std;

#define ll long long
#define rep(i, a, n) for (int i = (int)(a); i < (int)(n); i++)
#define rrep(i, n, a) for (int i = (int)(n); i >= (int)(a); i--)

void solve(){
    ll n; cin >> n;
    ll t = n;
    int i = 2;
    int cnt = 0;
    while(n > 0 && i*i <= t){
        if(n % i == 0){
            cnt++;
            if(cnt >= 3){
                cout << "No";
                return;
            }
            while(n % i == 0) n /= i;
        }
        i++;
    }
    cout << "Yes";
}

int main(){

    solve();

    return 0;
}