Error 497 is related to a downloading category and you usually encounter it while you try to update the applications using a WiFi connection. In this case, adding Google DNS addresses (22.214.171.124 / 126.96.36.199) to your router's configuration settings could solve the problem. Also you can restart your phone into Recovery Mode and perform the following operations:
- Wipe Cache (from the first menu).
- Navigate to Advanced and select Wipe Dalvik Cache then restart your computer.
Another try is to go into phone's menu > Settings> Applications > Running Services, stop Google Framework and then start the Play Store application. After all these operations, try and update the applications again.