X = int(input())
res = 1
i = 2
cnt = 0
while X % i == 0:
    X //= i
    cnt += 1
if cnt % 2 == 1:
    res *= i

i += 1
while X != 1:
    cnt = 0
    while X % i == 0:
        X //=  i
        cnt += 1
    if cnt % 2 == 1:
        res *= i
    i += 2
print(res)