Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_17 ( population INTEGER, area__km_2__ VARCHAR, code VARCHAR )

### Question ###
What is the average population for an area less than 433.7km and a 23013 code?

### Accurate SQL ###

SELECT AVG(population) FROM table_name_17 WHERE area__km_2__ < 433.7 AND code = 23013