def f(R):
    if R == 1:
        return []
    i = 2
    l = []
    while True:
        if R % i == 0:
            R = R / i
            l.append(i)
            if R == 1:
                break
        else:
            i += 1
    return l

N = int(input())
l = f(N)
if len(l) <= 2:
    print("NO")
else:
    print("YES")