Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_12146637_1 (series__number INTEGER, us_viewers__millions_ VARCHAR)
### Question:
What is the series number of the episode watched by 10.89 million viewers?
### Answer:
SELECT MAX(series__number) FROM table_12146637_1 WHERE us_viewers__millions_ = "10.89"