For physical cards, your primary account number (PAN or simply called 'card number') is the 16-digit number on the front. Just below, you'll find the card's expiry date (month/year).
The card verification value (CVV) is the three-digit number located on the back of your MasterCard, next to your signature.
For both physical and virtual cards, you can see this information in your app in the 'Cards' section. Select your card and click on 'Show card number' to make your PAN, CVV and expiry date appear for a few seconds.