#include <cstdio>

int main(void) {
  long long int x, x2;
  scanf("%lld", &x);x2=x;

  long long int i = 2;
  long long int j = 0;
  long long int answer = 1;

  while (x2 >= i * i) {
    if (x % i == 0) {
      x /= i;
      j++;
    } else {
      if (j % 2 == 1) answer *= i;
      j = 0;
      i++;
    }
  }

  answer *= x;

  printf("%lld\n", answer);

  return 0;
}