Prime Numbers
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Numbers
Compare 31 vs 97
Compare 31 vs 97
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Property
31
97
Type
prime
prime
Unique factors
1
1
Total factors
1
1
Prime factorization
31
1
97
1
Prime factorization
31
97
Divisors count
2
2
Divisors
1
,
31
1
,
97
Number of properties
18
20
Centered decagonal primes
2nd
Centered triangular primes
2nd
Chen primes
11th
Class 1+ primes
8th
Cousin primes
(1st member)
9th
Emirps
3rd
8th
Euclid primes
4th
Good primes
11th
Happy primes
5th
7th
Isolated primes
10th
Left-truncatable primes
15th
Long primes
9th
Lucky primes
4th
Mersenne primes
3rd
Multiplicative primes
7th
Pierpont primes
10th
Pierpont primes of the 2nd kind
8th
Primes
11th
25th
Prime quintuplet 1s
(1st member)
2nd
Prime sextuplets
(1st member)
2nd
Prime triplets
(1st member)
9th
Proth primes
6th
Pythagorean primes
11th
Quartan primes
3rd
Right-truncatable primes
7th
Sexy primes
(1st member)
7th
16th
Sexy prime triplets
(1st member)
5th
10th
Solinas primes
10th
20th
Super primes
5th
Thabit primes of the 2nd kind
3rd
Twin primes
(2nd member)
5th
Ulam primes
7th
Roman numberals
XXXI
XCVII
Base 2
11111
2
1100001
2
Base 3
1011
3
10121
3
Base 4
133
4
1201
4
Base 5
111
5
342
5
Base 6
51
6
241
6
Base 7
43
7
166
7
Base 8
37
8
141
8
Base 9
34
9
117
9
Base 10
31
10
97
10
Base 11
29
11
89
11
Base 12
27
12
81
12
Base 13
25
13
76
13
Base 14
23
14
6d
14
Base 15
21
15
67
15
Base 16
1f
16
61
16
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