- 397 is the 19th Individual Twin Gaussian Composite
- 397th Prime is 2719
- 2719 is the 237th Chen Prime
- 237 = 3 × 79
- 379 is the 19th Happy Prime
- 379th Lonely Gaussian Prime is 9127
- Sura 9 has 127 verses
- 379th Lonely Gaussian Composite is 9221
- Sura 92 has 21 verses.
- 9221 is the 1143rd Prime Number
- 1143 = 9 × 127
- Sura 9 has 127 verses.
