def prime_judgement(x):
    yakusu_count = 0
    for i in range(2, x):
        if x % i == 0:
            yakusu_count += 1
    if yakusu_count == 0:
        return True
    else:
        return False

def main():

    n = int(input())
    if prime_judgement(n):
        print("NO")
    else:
        print("YES")

if __name__ == "__main__":
    main()