def pv(n):
    i = 2
    count = 0
    while i * i <= n:
        while n % i == 0:
            n /= i
            count += 1
        i += 1
    if n > 1:
        count += 1
    return count

n = int(input())

print("YES" if pv(n) >= 3 else "NO")