7

7 (seven) is the natural number following 6 and preceding 8. It is the smallest positive integer to be spoken with two syllables when pronounced in English. It is also said to be a lucky number. In quaternary, 7 is the smallest prime with a composite sum of digits. In the beginning, various Hindus wrote 7 more or less in one stroke as a curve that looks like an uppercase J vertically inverted. The western Ghubar Arabs' main contribution was to ma... more

7 (seven) is the natural number following 6 and preceding 8. It is the smallest positive integer to be spoken with two syllables when pronounced in English. It is also said to be a lucky number. In quaternary, 7 is the smallest prime with a composite sum of digits. In the beginning, various Hindus wrote 7 more or less in one stroke as a curve that looks like an uppercase J vertically inverted. The western Ghubar Arabs' main contribution was to make the longer line diagonal rather than straight, though they showed some tendencies to making the character more rectilinear. The eastern Arabs developed the character from a 6-look-alike into an uppercase V-look-alike. Both modern Arab forms influenced the European form, a two-stroke character consisting of a horizontal upper line joined at its right to a line going down to the bottom left corner, a line that is slightly curved in some font variants. As is the case with the European glyph, the Cham and Khmer glyph for 7 also evolved to look... less