4991 = 12 × 34 × 5 + 6 × 7 + 89
4991 = (98 + 7 + 6 + 5) × 43 + 2 + 1
4991 = 0^8 + 1^9 − 2^6 + 3^7 + 4^5 + 5^2 + 6^4 + 7^0 + 8^3 + 9^1
4991 divides 68^6 - 1.
4991 cannot be written as a sum of 3 squares. (Integers that are not a sum of three squares)
Sphenic number: Product of 3 distinct Primes, (List)
Factors: 1, 7, 23, 31, 161, 217, 713, 4991
Four thousand, nine hundred ninety-one
Representations, Binary to Hexadecimal:
1001101111111_2
20211212_3
1031333_4
124431_5
35035_6
20360_7
11577_8
6755_9
3828_11
2a7b_12
236c_13
1b67_14
172b_15
137f_16
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