x = int(input())
n = 2
m = 0
Y = 1
while x != 1:
    if x%n == 0:
        m += 1
        x = x/n
    else:
        if m %2 !=0:
            Y *= n
        n +=1
        m = 0

if m % 2 != 0:
    Y *= n
print(Y)