import math

n_str = input().strip()
n = int(n_str)

if n == len("a"):
    print("NO")
elif n == len("aa"):
    print("YES")
elif n % len("aa") == 0:
    print("NO")
else:
    is_prime = True
    k_str = "abc"  # 长度3
    max_k = math.isqrt(n)
    while len(k_str) <= max_k:
        k = len(k_str)
        if n % k == 0:
            is_prime = False
            break
        k_str += "ab"  # 增加两个字符，k增加2
    print("YES" if is_prime else "NO")