import math

def sosuiya(N):
    result = []
    i = 2
    M = N
    while i <= math.sqrt(N):
        if N % i == 0:
            result.append(i)
            if len(result) >= 2:
                if result[0] * result[1] < M:
                    return 'YES'
                else:
                    return 'NO'
            N = N // i
        elif N % i > 0:
            i += 1
    return 'NO'

def main():
    N = int(input())
    print(sosuiya(N))

if __name__ == '__main__':
    main()