#include <stdio.h>
int n;
int main ()
{
while (scanf("%d", &n) != EOF)
{
int f = 0;
for (int i = 2; i < n; i ++) {
if (n%(i*i) == 0) {
printf ("Yes\n");
f = 1;
break;
}
}
if (f == 1) {
continue;
} else {
printf ("No\n");
}
}
}