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_23390604_1 ( mohsen_rezaee INTEGER, mir_hossein_mousavi VARCHAR )

### Question ###
What is the highest score for candidate Mohsen Rezaee when candidate mir-hossein mousavi scored 837858 votes?

### Accurate SQL ###

SELECT MAX(mohsen_rezaee) FROM table_23390604_1 WHERE mir_hossein_mousavi = 837858