YOU SAID:
i Am the worlds number one dad
INTO JAPANESE
私は世界ナンバーワンのお父さんです
BACK INTO ENGLISH
I am the world's number one father
INTO JAPANESE
私は世界一の父です
BACK INTO ENGLISH
I am the best father in the world
INTO JAPANESE
私は世界で最高の父です
it is unlikely that this phrase will ever reach equilibrium