Five is the number of the human being and of the senses, five fingers, five toes, five senses, and the figure a person makes with limbs outstretched, the microcosm inscribed in the pentagram that so preoccupied Renaissance magic. It is the sum of the first even and first odd number, two and three, and was called by the Pythagoreans the number of marriage for that reason, the joining of the female two and the male three. As the midpoint of the digits one to nine it carries a sense of the centre, of balance and of turning. Its shapes recur in nature, from the five petals of many flowers to the fivefold symmetry of the starfish and the apple's core. From all this comes its symbolism of humanity, the senses, freedom, movement and adventure.
In modern numerology five is the number of change, freedom, travel, curiosity and the restless senses, the most mobile and unpredictable of the digits. That reading is a product of the American numerology of around 1900 rather than of the ancient sources, though the human and sensory associations of five are genuinely old.