import sys
from math import sqrt

def solve():
    x = int(input())

    y = 1

    for p in range(2, int(sqrt(x)) + 1):
        q = 0

        while x % p == 0:
            q += 1
            x //= p

        if q & 1:
            y *= p

    if x > 1:
        y *= x

    print(y)

if __name__ == '__main__':
    solve()