#include <iostream>
#include <string>
#include <vector>
#include <cmath>
using namespace std;

int main(){

	long long int x;
	long long int y = 1;
	cin >> x;

	int cnt = 0;
	while (!(x%2)) {
		x = x / 2;
		cnt++;
	}
	if (cnt % 2) {
		y *= 2;
	}

	for (long long int i = 3; i*i <= x; i += 2)
	{
		cnt = 0;
		while (!(x%i)) {
			x = x / i;
			cnt++;
		}
		if (cnt % 2) {
			y *= i;
		}
		if (x == 1) break;
	}

	cout << y*x << endl;

	return 0;
}