from math import sqrt
N=int(input())

def premier(x):
    for i in range(2,int(sqrt(x))+1):
        if x%i==0:
            return False
    return True

if premier(N):
    print('N')
else:
    k=sqrt(N)
    if int(k)**2==N and premier(k):
        print('N')
    else:
        print('Y')