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Facts about the number 7

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0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 are the ten numbers that make up every other number! Seven is the seventh number in the numeral system and it is also a prime number.

“Hept” and “sept” means seven. Hence, a heptagon is a figure with seven sides and a heptachord is a seven-stringed musical instrument. Additionally, a septennium is a period of seven years. Interestingly, the month of September sued to be the seventh month in the year!

There is a lot of numerical symbolism associated with the number seven. For example, in Christianity there are seven deadly sins—avarice, envy, gluttony, lust, pride, sloth and wrath—and seven virtues—chastity, temperance, charity, diligence, patience, kindness and humility.

Many things come in sets of seven. There are seven days of the week and various categories of the Seven Wonders of the World which describe truly amazing things in both the natural, manmade, present day and ancient world. There is also a cluster of stars called the “Seven Sisters.” Seven is a unique word in the English language because it is one of only two single-digit numbers that has two syllables (the other number is zero).

Below is a list of five facts about the number seven:

Favorite Seven
Favorite Seven Mike Stobe/Getty Images

Favorite Seven

Studies have been done that claim that if people are asked to name any number between one and ten most will say seven. A majority of people also list seven as being their favorite number between one and ten.

John Moore/Getty Images
John Moore/Getty Images Lucky Seven

John Moore/Getty Images

Superstitious people believe that the number seven is a lucky number. This probably dates back to the ancient Hebrews who considered seven to be perfect number and associated it with completeness. Additionally, in Britain the seventh son of a seventh son was once believed to have magical powers. 

Kevin Winter/Getty Images
Kevin Winter/Getty Images Memorable Seven

Kevin Winter/Getty Images

In 1956 a cognitive psychologist named George Miller wrote an article titled The Magical Number Seven Plus or Minus Two: Some Limits on Our Capacity for Processing Information. His article was about memory and how much information the average person can process. George Miller’s findings suggested that the average person is limited to remembering about seven items at a time—as is a required task on some game shows!

Matt Stroshane/Disney Parks via Getty Images
Matt Stroshane/Disney Parks via Getty Images Seven in Literature

Matt Stroshane/Disney Parks via Getty Images

Seven can also be important in literature too. For example, there are seven books in the massively popular “Harry Potter” series and seven dwarves in the famous fairy tale “Snow White.”

Suhaimi Abdullah/Getty Images
Suhaimi Abdullah/Getty Images Seven and Sports

Suhaimi Abdullah/Getty Images

Seven is also a number that has an impact of certain sports. For example, netball and water polo are both played with teams of seven players. Furthermore, because many people believe that seven is a lucky number a lot of players wear it on their jerseys.

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