868

868 = 2 x 2 x 7 x 31.

4⁸⁶⁸ - 3 is a prime number.

868 has a square root whose decimal part starts with the digits 1 to 9 in some order: 29.461839725. . .

868 is 4004 in base 6 (A029963).

868 is the number of ways of writing 60 as a sum of eight nonnegative cubes (A173681).

Source: Prime Curios!