73
After seventy-two
Seventy-three is an integer between 72 and 74.
In amateur radio, 73 is a traditional sign-off meaning "best regards"—a holdover from telegraph codes: 73 and good DX.
The number has no special mathematical properties beyond being prime, though some claim it as a favorite for that reason.
Readying for action
- oddUnusual or not even
- FibonacciPisan mathematician, numeral importer
- triangularThree-cornered in form
- integerNumber lacking fractions
sequence · divisor · factor · factorial · composite · modular · congruence · Fermat
Duration of existence
- scoreNumerical standing in competition
- jerseyKnitted pullover garment
- highwayMajor road for travel
- routePath from A to B
bus · flight · channel · address · lottery · countdown · ranking · percentile
prime
Readying for action
- oddUnusual or not even
- FibonacciPisan mathematician, numeral importer
- triangularThree-cornered in form
integer · sequence · divisor · factor · factorial · composite · modular · congruence · Fermat · Euler
age
Duration of existence
route · bus · flight · channel · address · lottery · countdown · ranking · percentile · milestone
tantalum
Element seventy-three, symbol Ta
electron · nucleus · isotope · hafnium · germanium · arsenic · selenium · bromine · rhenium · tungsten
lucky
Favored by chance
- fortuneWealth or destiny
- chanceLikelihood of occurrence
- superstitionBaseless belief in omens
auspicious · charmed · blessing · gambling · slot · jackpot · windfall · omen · karma · roll