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73 as a star number (up to blue dots). 37, its dual permutable prime, is the preceding consecutive star number (up to green dots). 73 and 37 are also consecutive star numbers, equivalently consecutive centered dodecagonal (12-gonal) numbers (respectively the 4th and the 3rd). [2]
Tantalum is a chemical element; it has symbol Ta and atomic number 73. It is named after Tantalus, a figure in Greek mythology. [11] Tantalum is a very hard, ductile, lustrous, blue-gray transition metal that is highly corrosion-resistant. It is part of the refractory metals group, which are widely used as components of strong high-melting ...
A prime number (or prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself. ... 8n+1: 17, 41, 73, 89, 97, 113, ...
Provides the directory number, date and time of unanswered calls. *52 1152 ... *73 1173 Call forward: Cancel *74 1174 Speed calling (8 numbers) *75 1175
Other examples, of internationally recognized uses of Morse code abbreviations and well known code numbers, such as those of the Phillips Code from past eras of telegraph technology, are abbreviations such as WX for weather and SX for dollar, and from wire signal codes, the numbers 73 for best regards and 88 for love and kisses.
A star prime is a star number that is prime. The first few star primes (sequence A083577 in the OEIS) are 13, 37, 73, 181, 337, 433, 541, 661, 937. A superstar prime is a star prime whose prime index is also a star number. The first two such numbers are 661 and 1750255921. A reverse superstar prime is a star number whose index is a star prime ...
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A list of articles about numbers (not about numerals). Topics include powers of ten, notable integers, prime and cardinal numbers, and the myriad system.