Our Father gives us all a degree of faith, this can develop like the mustard seed.
God is no respecter of person, we all have that gift, that ability to believe, both believers and those who are not.
But it is most recommended that you put your faith in Jesus who is the author and consumer of faith.
God's word teaches us that faith comes by hearing.
Rahab was a harlot whose faith led her to help the Israelite spies, when they were sent by Joshua to the lands of Jericho to recognize them.

Faith must always lead us to act, remembering that faith without work is dead.
Rahab's faith was increased upon hearing that Jehovah had dried up the waters of the Red Sea before the people of Israel when they left Egypt, just as he destroyed the two kings of the Amorites who were across the Jordan from Sehon and Og.
Rahab recognized that Jehovah was God above in the heavens and below on the earth, and she made the spies swear by Jehovah that just as she had mercy on them by hiding them in her house, they too would have her with all her family and deliver them of death.
This was how the faith of a harlot contributed to the mission of these two spies by protecting them in their home.