CREATE TABLE table_27897 ("Settlement" TEXT, "Cyrillic Name" TEXT, "Type" TEXT, "Population  ( 2011 ) " FLOAT, "Largest ethnic group  ( 2002 ) " TEXT, "Dominant religion  ( 2002 ) " TEXT)

How many dominant religions were in the settlement that had a population of 17105?
SELECT COUNT("Dominant religion (2002)") FROM table_27897 WHERE "Population (2011)" = '17105'
SELECT COUNT("Dominant religion (2002)") FROM "table_27897" WHERE "Population (2011)" = '17105'