Prime Numbers
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Numbers
Compare 13 vs 61
Compare 13 vs 61
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Property
13
61
Type
prime
prime
Unique factors
1
1
Total factors
1
1
Prime factorization
13
^{1}
61
^{1}
Prime factorization
13
61
Divisors count
2
2
Divisors
1
,
13
1
,
61
Number of properties
32
12
Additive primes
11th
Centered decagonal primes
3rd
Centered square primes
2nd
4th
Chen primes
6th
Cousin primes
(1st member)
3rd
Cuban primes 1
4th
Cuban primes 2
1st
Emirps
1st
Fibonacci primes
4th
Happy primes
2nd
Harmonic primes
2nd
Left-truncatable primes
5th
Long primes
8th
Lucky primes
3rd
Multiplicative primes
5th
Pierpont primes
5th
Primes
6th
18th
Prime quadruplets
(2nd member)
2nd
Prime quadruplets
(4th member)
1st
Prime quintuplet 1s
(3rd member)
1st
Prime quintuplet 2s
(2nd member)
2nd
Prime quintuplet 2s
(4th member)
1st
Prime sextuplets
(3rd member)
1st
Prime triplets
(1st member)
4th
Prime triplets
(2nd member)
3rd
Prime triplets
(3rd member)
2nd
Proth primes
3rd
Pythagorean primes
2nd
8th
Sexy primes
(1st member)
4th
12th
Sexy primes
(2nd member)
2nd
Sexy prime quadrupletss
(1st member)
4th
Sexy prime triplets
(1st member)
8th
Sexy prime triplets
(2nd member)
2nd
Solinas primes
5th
15th
Thabit primes of the 2nd kind
2nd
Twin primes
(2nd member)
3rd
7th
Ulam primes
4th
Wilson primes
2nd
Roman numberals
XIII
LXI
Base 2
1101
_{2}
111101
_{2}
Base 3
111
_{3}
2021
_{3}
Base 4
31
_{4}
331
_{4}
Base 5
23
_{5}
221
_{5}
Base 6
21
_{6}
141
_{6}
Base 7
16
_{7}
115
_{7}
Base 8
15
_{8}
75
_{8}
Base 9
14
_{9}
67
_{9}
Base 10
13
_{10}
61
_{10}
Base 11
12
_{11}
56
_{11}
Base 12
11
_{12}
51
_{12}
Base 13
10
_{13}
49
_{13}
Base 14
d
_{14}
45
_{14}
Base 15
d
_{15}
41
_{15}
Base 16
d
_{16}
3d
_{16}
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