730

[Math.]  A base system of multigrade equalities: (References [??])

1+4+12+13+20 = 50 = 2+3+10+16+19

12+42+122+132+202 = 730 = 22+32+102+162+192

13+43+123+133+203 = 11,990 = 23+33+103+163+193

Multigrade equalities still hold by adding any integer n to every base term in both sides.  Hence, the base equality always has number 1 appearing in one side. 

 

731...

 

732

[Math.]  732 = 17+26+35+44+53+62+71.

 

[World] The ISO country code for Western Sahara (was Spanish Sahara). (ISO-3166)

 

733

[Math.] A right-truncatable prime number: self, 73 and 7 are prime numbers.

 

[Math.]  An absolute prime number (or permutable prime number): all 3 numbers 733, 337 and 373 are prime or in fact, absolute prime.  Also: circular prime numbers.

 

[Math.]  733 = 08+17+26+35+44+53+62+71+80.

 

734...

 

735

[Math.] 735 = 72×3×5.

 

[Tech.]  1 metric horsepower (hp) =735.499 W (watts) = 542.48 ft×lb/s (feet×pound/second). Sometimes, it is 750 W.

 

736 

[World]  The ISO country code for Sudan. (ISO-3166)

 

737

[Tech.]  Boeing 737 airplane, a member in the family of passenger airplane/jetliner models “7n7”: 707, 717, 727, 737, 747, 757, 767, 777, 7E7 and 787.

 

738

[Math.]  621,770+77,126 = 8362 = 698,896 (a palindromic square number)

and 621,770–077,126 = 7382 = 544,644.

 

739

[Math.]  A right-truncatable prime number: self, 73 and 7 are prime numbers.

 

730-739

[Library]  Numbers 700-799 are the first 3 digits in Dewey Decimal Classification System call numbers for library books in Fine Arts (Painting, Music, Sport and Photography…). Numbers 730-739 are for books in Sculpture and Carvings…