n = int(input())

if n == 1:
    print('NO')
    exit()

import math
def factorize(n):
    d = {}
    temp = int(math.sqrt(n))+1
    for i in range(2, temp):
        while n%i== 0:
            n //= i
            if i in d:
                d[i] += 1
            else:
                d[i] = 1
    if d == {}:
        d[n] = 1
    else:
        if n in d:
            d[n] += 1
        elif n != 1:
            d[n] =1
    return d

d = factorize(n)
if len(d) == 1:
    for k, v in d.items():
        if v <= 2:
            print('NO')
        else:
            print('YES')
elif len(d) == 2:
    for k, v in d.items():
        if v >= 2:
            print('YES')
            exit()
    else:
        print('NO')
else:
    print('YES')