#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
int main() {
	cin.tie(0); ios_base::sync_with_stdio(0);

	ll n;
	cin >> n;

	int x = 0, y = 0, z = n;
	for (ll d = 2; d * d <= n; d++) {
		if (z % d == 0) ++x;
		while (z % d == 0) {
			z /= d;
			++y;
		}
	}
	if (n != 1) ++x, ++y;

	if ((x == 1 && y == 1) || (x == 2 && y == 2)) {
		cout << "Y\n";
	}
	else {
		cout << "N\n";
	}
}