P = [1 for _ in range(10**6)]
P[0]=0
P[1]=0
for i in range(2,1001):
    for j in range(i*i,10**6,i):
        P[j]=0
Q = []
for i in range(10**6):
    if P[i]==1:
        Q.append(i)
x = int(input())
C = {}
for q in Q:
    if x%q==0:
        C[q]=0
        while x%q==0:
            x = x//q
            C[q] += 1
if x>1:
    C[x] = 1
y = 1
for q in C:
    if C[q]%2==1:
        y = y*q
print(y)