Mix graham cracker crumbs, granulated sugar, cinnamon, and melted butter until combined. Press firmly into the bottom of a 9-inch springform pan. Bake at 325°F (163°C) for 8–10 minutes. Let cool.
Beat softened cream cheese until smooth. Add brown sugar and granulated sugar; mix until blended. Mix in pumpkin purée, sour cream, vanilla, pumpkin pie spice, and cinnamon. Add eggs one at a time, mixing gently just until combined.
Pour the batter over the cooled crust. Tap the pan on the counter to release air bubbles and smooth the top.
Wrap the springform pan in foil and set it in a larger roasting pan. Fill the roasting pan with hot water halfway up the sides. Bake at 325°F (163°C) for 55–65 minutes, until the center is just set and slightly jiggly.
Turn off the oven and crack the door. Let the cheesecake cool inside for 1 hour, then refrigerate at least 6 hours or overnight.
Top with whipped cream and a sprinkle of cinnamon before serving.