727

727 is a prime number.

727 is the smallest prime of the form n³ - 2.

727 = 1! + (1 + 2)! + (1 + 2 + 3)!

727 is the smallest odd prime that can be represented as the sum of a cube and its reversal: 727 = 8³ + 215 = 512 + 215.

727 is the first prime whose square (528529) can be represented as the concatenation of two consecutive numbers.

The Boeing 727 was the first three-engine jet built for commercial service.

Source: Number Gossip