2091 = 1 + 23 × (45 + 6 × 7) + 89
2091 = 9 + (87 + 65 × 4) × 3 × 2 × 1
2091 = 0^6 + 1^7 + 2^9 − 3^8 + 4^5 + 5^1 + 6^2 + 7^0 + 8^3 + 9^4
2091 divides 50^4 - 1.
Numbers k such that 7^k - 2 is a prime.
Sphenic number: Product of 3 distinct Primes, (List)
Factors: 1, 3, 17, 41, 51, 123, 697, 2091
Two thousand, ninety-one
100000101011_2
2212110_3
200223_4
31331_5
13403_6
6045_7
4053_8
2773_9
1631_11
1263_12
c4b_13
a95_14
946_15
82b_16
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