73 is a Prime Number
73 = 12 + 3 + 4 + 5 × 6 + 7 + 8 + 9
73 = 9 + 8 + 7 × 6 + 5 + 4 + 3 + 2 × 1
73 = 0^6 − 1^9 − 2^8 − 3^7 + 4^5 + 5^3 + 6^4 + 7^1 + 8^2 + 9^0
Sexy Prime (Primes p such that p + 6 is also prime)
Part of the Cunningham chain of the second kind 19, 37, 73
\( 73^2 = 48^2 + 55^2 \)
Number of fractions in Farey series of order 15: 0/1, 1/15, 1/14, 1/13, 1/12, 1/11, 1/10, 1/9, 1/8, 2/15, 1/7, 2/13, 1/6, 2/11, 1/5, 3/14, 2/9, 3/13, 1/4, 4/15, 3/11, 2/7, 3/10, 4/13, 1/3, 5/14, 4/11, 3/8, 5/13, 2/5, 5/12, 3/7, 4/9, 5/11, 6/13, 7/15, 1/2, 8/15, 7/13, 6/11, 5/9, 4/7, 7/12, 3/5, 8/13, 5/8, 7/11, 9/14, 2/3, 9/13, 7/10, 5/7, 8/11, 11/15, 3/4, 10/13, 7/9, 11/14, 4/5, 9/11, 5/6, 11/13, 6/7, 13/15, 7/8, 8/9, 9/10, 10/11, 11/12, 12/13, 13/14, 14/15, 1/1
Weak veryprime
Factors: 1, 73
Binary :
Octal :
Hex :
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