The most important numbers

π pi the ratio of the circumference of a circle to its diameter
3.1415926535897932384626433

e Euler’s number Base of the natural logarithms (ln)
2.7182818284590452353602874

-1 minus one or negative one

1 positive one +1

0 zero, nothing, nil, naught

i imaginary number = square root of minus one = √(-1)

γ gamma Euler’s constant
0.5772156649015328606065120

ϕ phi or φ golden ratio (1-√5)/2
1.6180339887498948482

c speed of light
299, 792, 456 meters per second

h Plank constant quantum of action
6.62607015 x 10^-34 joule seconds

∝ alpha Fine-structure constant
0.0072973525664
∝^(-1)= 137035999173

G Gravitational constant
6.67408 x 10^-11 m^3 kg^(-1) s^(-2)