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_19590 ( "INEGI code" real, "Municipality" text, "Municipal Seat" text, "Area (km 2 )" text, "Population (2005)" real, "Population density (/km 2 )" text, "Human Development Index (2000)" text )

### Question ###
What is the total number of population in the year 2005 where the population density 35.9 (/km 2)?

### Accurate SQL ###

SELECT COUNT("Population (2005)") FROM table_19590 WHERE "Population density (/km 2 )" = '35.9'