def Divisor(n):
    cnt = 0
    if n == 1:
        return False
    elif n == 2:
        return False
    else:
        i = 2
        while n >= i * i:
            if n % i == 0:
                cnt += 1
                n //= i
                continue
            i += 1
            
        return cnt >= 2
    return False

n = int(input())

if Divisor(n):
    print("YES")
else:
    print("NO")