import math


def isPrimeNumber(N):
    if N == 0:
        return False
    elif N == 1:
        return True
    elif N == 2:
        return True
    elif N % 2 == 0:
        return False
    else:
        for i in range(3, math.ceil(math.sqrt(N)), 2):
            if N % i == 0:
                return False
        return True


if __name__ == '__main__':
    N = int(input())
    if isPrimeNumber(N):
        print('NO')
    else:
        print('YES')