Numbers 990,000,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

900,000,000 –  910,000,000920,000,000930,000,000 – 940,000,000

950,000,000 –  960,000,000970,000,000980,000,000990,000,000

[1M] & [10M] & [100M- [200M] - [300M] - [400M] - [500M] - [600M] - [700M] - [800M] - [900M]  & [1B]

1  - 10 - 100  - 1000 - 10,000 - 100,000 - 1M - 10M - 100M1B10B - 100B - 1T - 10T - 100T - 1Q ...

991,026,973

[Math.]  (Sequence of numbers (10n–3), n ³ 2).

991,026,973 = (991+02–69+73)3 = 9973.

992,222,299

[Math.]  A prime number.

994,011,992

[Math.]  (Sequence of numbers (10n–2), n ³ 2)

994,011,992 = (994+0+1+1+9–9+2)3 = 9983.

995,555,599

[Math.] A prime number.

996,302,784

[Math.] 996,302,7843 =  988,949,309,679,704,837,296,226,304; All digits are “triplicated”. (References [15])

997,002,999

[Math.] 997,002,999 = (997+002)3 = 9993The largest 9-digit cube number.

998,500,500

[Math.]  Two consecutive sums of consecutive numbers: (largest 9-digit)

998,001+…+999,000 = 999,001+…+999,999 = 998,500,500.

998,877,889

[Math.]

99,889×11+(11–1) = 1,098,789

998,877,889×11+(11–1) = 10,987,656,789

9,988,776,677,889×11+(11–1) = 109,876,543,456,789

99887766556677889×11+(11–1) = 1,098,765,432,123,456,789

...

998,999,999

[Math.] A prime number. (1 digit 8 between 8 digits 9).

999,000,000s (separate page)

xyz,abc,def

[Math.]  For any xyz = 100 to 999, there are always six 6-digit numbers abc,edf such that the sum (xyz+abc,def) is equal to one of 6 digit-rotations of 142,857 and the number  xyz,abc,def is a multiple of 142,857.

For any xyz = 100 to 999, there are always twelve 6-digit numbers abc,edf such that the sum (xyz+abc,def) is equal to one of 12 digit-rotations of 076,923 or 153,846 and the number xyz,abc,def is a multiple of 76,923.

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References [15]