def is_sciper(sciper):
    """
    Checks if the given argument is a valid Sciper number
    :param sciper: sciper to check
    :return: Whether sciper is valid or not
    """
    if str(sciper).isnumeric():
        sciper = int(sciper)
        if 100000 < sciper < 999999:
            return True
    return False