73 (number)

73 (seventy-three) is a positive, odd integer. Sequentially, it comes after seventy-two, but before seventy-four. 73 is prime and is the 21st prime number. 7 multiplied by 3 is also 21. Its mirror, 37, is also a positive, odd integer prime, and is the 12th prime number, 12 being the mirror of 21.

in binary, 73 is a palindrome, 1001001, which backwards is 1001001.

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