2603

2603 = 19 x 137.

2603 divides 37⁴ - 1.

The 2603rd prime minus 2603 gives a square and a fourth power (A064370 and A114067).

2603 is the smallest product of two distinct primes that is greater than 51² (A099610).

2603 is the sum of nine distinct positive pentatope numbers (A104399).

Source: OEIS