| Next prime | 349 |
| Previous prime | 337 |
| Octal | (533)8 |
| Hexadecimal | (15B)16 |
| Prime gap | 2 |
| 21st Twin prime (the small number) | The big number is 349 . |
| 20th Prime triplet (the smallest number) | The others are 349 and 353 . |
| 38th Sexy prime (the small number) | The big number is 353 . |
| 36th Prime of the Form 4n+3 | |
| 18th Emirp (reversible prime) | |
| 18th Euler prime number | |
| 13th Safe prime | |
| 26th Left-truncatable prime |