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_19229713_4 (_number INTEGER, us_viewers__million_ VARCHAR)
### Question:
Name the number for viewers being 1.87
### Answer:
SELECT MAX(_number) FROM table_19229713_4 WHERE us_viewers__million_ = "1.87"