E13

E1G♯3B5D♭7F♯9C♯13

Seven notes in theory and four or five in anyone’s hands: root, third, seventh and thirteenth carry it.

What is true of it

E13 is E, G♯, B, D, F♯ and C♯ — 1, 3, 5, b7, 9 and 13 counted from E.

On an instrument that cannot reach all 6, the 5, 9 and 1 go first, in that order.