999

999 = 3 × 3 × 3 × 37

999 = 12 × 3 × (4 + 5) + (67 + 8) × 9

999 = 9 + 8 + 7 + 654 + 321

999 = 0^6 + 1^8 + 2^5 − 3^9 + 4^7 + 5^3 + 6^2 + 7^1 + 8^4 + 9^0

999 , Kaprekar number

998 + 001 = 999 and 999² = 998001

999 = 888 + 888/8

999 = 777 × (7 + (7 + 7)/7)/7

999 = 6 × 666/(6 − (6 + 6)/6)

999 = (5 − 5/5)⁵ − 5 × 5

999 = (4 + 4 + 4/4) × 444/4

999 = 3 × 333

999 = (2 + 2/2)2 × 222/2

999 = 111 × (11 − 1 − 1)

Smallest number whose sum of digits is 27.

999 cannot be written as a sum of 3 squares. (Integers that are not a sum of three squares)

Factors: 1, 3, 9, 27, 37, 111, 333, 999

Nine hundred ninety-nine

Representations, Binary to Hexadecimal:

Roman: CMXCIX

1111100111_2
1101000_3
33213_4
12444_5
4343_6
2625_7
1747_8
1330_9
829_11
6b3_12
5bb_13
515_14
469_15
3e7_16

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