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_43203 ( "s Member state" text, "GDP 2012 millions of euro" text, "Population in millions" real, "GDP (PPP) per capita 2012 euro" text, "GDP (Nominal) per capita 2012 euro" text, "GDP (PPP) per capita 2012 EU27 = 100" text )

### Question ###
What is Population in Millions, when GDP 2012 Millions of Euro is 600,638?

### Accurate SQL ###

SELECT "Population in millions" FROM table_43203 WHERE "GDP 2012 millions of euro" = '600,638'