import math


def prime_decomposition(N):
    M = N
    i = 2
    table =[]
    while i * i <= N:
        while M % i == 0:
            M /= i
            table.append(i)
        i += 1
    if M > 1:
        table.append(M)
    return table


if __name__ == '__main__':
    N = int(input())
    if len(prime_decomposition(N)) == 1:
        print('NO')
    else:
        print('YES')