The number 63 is an odd composite number that comes after 62 and before 64. It is also a Harshad number, meaning that it is divisible by the sum of its digits. In Roman numerals, 63 is written as LXIII.
In mathematics, 63 is a semiprime number, as it is the product of two prime numbers: 3 and 21. It is also a square-free number, meaning that it is not divisible by any perfect square other than 1.
In science, the atomic number of europium is 63. Europium is a lanthanide element with the symbol Eu. It is a silver-colored metal that is used in the production of fluorescent lamps, some types of TV screens, and as a neutron absorber in nuclear reactors.
In sports, the 63rd edition of the NBA Finals took place in 2019, with the Toronto Raptors winning their first championship in franchise history by defeating the Golden State Warriors in six games.
Overall, the number 63 has various interesting properties and applications in mathematics, science, sports, and other fields.
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