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_39 (density__inhabitants_km_2__ INTEGER, city VARCHAR, area__km_2__ VARCHAR, altitude__mslm_ VARCHAR)

### Question ###
What is the lowest density of alessandria where the area is bigger than 16.02 and altitude is less than 116?

### Accurate SQL ###

SELECT MIN(density__inhabitants_km_2__) FROM table_name_39 WHERE area__km_2__ > 16.02 AND altitude__mslm_ < 116 AND city = "alessandria"