Prime Numbers
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Numbers
Compare 31 vs 109
Compare 31 vs 109
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vs
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Property
31
109
Type
prime
prime
Unique factors
1
1
Total factors
1
1
Prime factorization
31
1
109
1
Prime factorization
31
109
Divisors count
2
2
Divisors
1
,
31
1
,
109
Number of properties
18
19
Centered decagonal primes
2nd
Centered triangular primes
2nd
3rd
Chen primes
11th
23rd
Class 1+ primes
8th
Cousin primes
(1st member)
11th
Cuban primes 2
2nd
Emirps
3rd
Euclid primes
4th
Happy primes
5th
9th
Long primes
10th
Lucky primes
4th
Mersenne primes
3rd
Multiplicative primes
7th
Pierpont primes
11th
Pierpont primes of the 2nd kind
8th
Primes
11th
29th
Prime quadruplets
(4th member)
3rd
Prime quintuplet 1s
(5th member)
2nd
Prime quintuplet 2s
(4th member)
3rd
Prime sextuplets
(5th member)
2nd
Prime triplets
(2nd member)
12th
Prime triplets
(3rd member)
11th
Pythagorean primes
13th
Right-truncatable primes
7th
Sexy primes
(1st member)
7th
Sexy primes
(2nd member)
18th
Sexy prime triplets
(1st member)
5th
Sexy prime triplets
(3rd member)
10th
Solinas primes
10th
Super primes
5th
10th
Twin primes
(2nd member)
5th
10th
Roman numberals
XXXI
CIX
Base 2
11111
2
1101101
2
Base 3
1011
3
11001
3
Base 4
133
4
1231
4
Base 5
111
5
414
5
Base 6
51
6
301
6
Base 7
43
7
214
7
Base 8
37
8
155
8
Base 9
34
9
131
9
Base 10
31
10
109
10
Base 11
29
11
9a
11
Base 12
27
12
91
12
Base 13
25
13
85
13
Base 14
23
14
7b
14
Base 15
21
15
74
15
Base 16
1f
16
6d
16
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