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

#define int long long

const double EPS = 1e-1;

signed main()
{
	int X;
	cin >> X;
	int Y = 1, s = sqrt(X) + EPS;
	int cnt = 0;
	for (int i = 2; i <= s && X > 1; i++)
	{
		int j = 0;
		while (X%i == 0 && X > 1) X /= i, j++, cnt++;
		if (j&1) Y *= i;
	}
	Y *= X;
	printf("%lld\n", Y);
	return 0;
}