1. Numbers
  2. Compare 73 vs 81

Compare 73 vs 81

Property7381
Typeprimecomposite number
Unique factors11
Total factors14
Prime factorization73134
Prime factorization733 × 3 × 3 × 3
Divisors count25
Divisors1, 731, 3, 9, 27, 81
Number of properties170
Emirps6th 
Harmonic primes7th 
Left-truncatable primes13th 
Lucky primes8th 
Pierpont primes9th 
Primes21st 
Prime triplets (3rd member)8th 
Pythagorean primes9th 
Right-truncatable primes12th 
Sexy primes (1st member)14th 
Sexy primes (2nd member)13th 
Sexy prime quadrupletss (3rd member)4th 
Sexy prime triplets (2nd member)9th 
Sexy prime triplets (3rd member)8th 
Solinas primes18th 
Twin primes (2nd member)8th 
Two-sided primes8th 
Roman numberalsLXXIIILXXXI
Base 21001001210100012
Base 322013100003
Base 41021411014
Base 524353115
Base 620162136
Base 713371447
Base 811181218
Base 98191009
Base 1073108110
Base 1167117411
Base 1261126912
Base 1358136313
Base 1453145b14
Base 154d155615
Base 1649165116
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