#include<bits/stdc++.h>

using namespace std;














using ll = long long;
bool check(ll n) {
    int count = 0;
    for (ll i = 2;i * i <= n; i++) {
        if (n %i == 0) {
            count++;
            while (n % i==0) n /= i;
        }
        if (count > 2)
return false;  
    }
    if (n> 1)
	count++;  
	
    return count == 2;
}

int main() {
    ll n;
    cin >> n;
    cout << (check(n) ?"Yes": "No") << endl;
}