8,419

[Math.]  A prime number.  The ratio 67352/8419 = 8, using each of 9 digits 1-9 once, shows how to arrange a 9-book set on 2 shelves to mark the book #8.

 

8,437

[Library]  ISBN-0-8437 is the International Standard Book Number for books published by Hammond World Atlas/Langenscheidt Publishing Group.

 

8,439

[Math.]  The ratio 67512/8439 = 8, using each of 9 digits 1-9 once, shows how to arrange a 9-book set on 2 shelves to mark the book #8.

 

8,460

[Math.]  Sum (in degrees) of all internal angles of a 49-side polygon.

 

8,461

[Math.]  A prime number.  Number 84619 starts with digits 22222

 

8,464

[Math.]  8486 = 922 = 72 + 82+ ...+292.

 

8,469

[Math.]  Two multiples of number 8469, 8469×2 = 16,938 and 8469×3 = 25,407, use each of 10 digits 0-9 once.

 

8,477

[Math.]  8477 = 65+54+43+32+21+10.

 

8,486

[Math.]  8486 = 888+44+888+6666.

 

8,487

[Library]  ISBN-0-8487 is the International Standard Book Number for books published by Oxmoor House/A Leisure Arts, Inc.

 

8,493

[Library]  ISBN-0-8493 is the International Standard Book Number for books published by CRC Press.