def make_divisors(n):
    lower_divisors, upper_divisors = [], []
    i = 1
    while i * i <= n:
        if n % i == 0:
            lower_divisors.append(i)
            if i != n // i:
                upper_divisors.append(n//i)
        i += 1
    return lower_divisors + upper_divisors[::-1]



def main():
    
    
    N = int(input())
    divisors = make_divisors(N)
    y = 0
    for d in divisors:
        y += d
    if y == 2 * N:
        print("Yes")
    else:
        print("No")
    
    
    
    
    
    
    
    
    
    
    
    



if __name__ == '__main__':
    main()