What are the interesting facts about the number 7?

# One of the most interesting facts about the number seven is its correlation with the cognitive abilities of human beings. The limits of human cognitive capacity lie within the range of 7 plus or a minus 2. read more

Meaning of Number 7. Number 7 is the number of perfection, security, safety and rest. Seven contains the number three of the heavens and soul with the number four of the earth and body. The Pythagoreans called the number 7 “the Septad”. The seven colors of the rainbow. read more

In mathematics, in the field of number theory, the Ramanujan–Nagell equation is an equation between a square number and a number that is seven less than a power of two. read more