47 (forty-seven) is the

natural number In mathematics, the natural numbers are the numbers 0, 1, 2, 3, and so on, possibly excluding 0. Some start counting with 0, defining the natural numbers as the non-negative integers , while others start with 1, defining them as the positive in ...

following 46 and preceding 48. It is a

prime number A prime number (or a prime) is a natural number greater than 1 that is not a Product (mathematics), product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime ...

. It is the adopted favorite number of

Pomona College Pomona College ( ) is a private university, private Liberal arts colleges in the United States, liberal arts college in Claremont, California. It was established in 1887 by a group of Congregationalism in the United States, Congregationalists ...

, a liberal arts college in Southern California, whose alumni have added cultural references to it in numerous places, including many ''

Star Trek ''Star Trek'' is an American science fiction media franchise created by Gene Roddenberry, which began with the Star Trek: The Original Series, series of the same name and became a worldwide Popular culture, pop-culture Cultural influence of ...

'' episodes.

Mathematics

47 is a safe prime, a Thabit prime, a regular prime, a

cluster prime In number theory, a cluster prime is a prime number such that every even positive integer ''k'' ≤ p − 3 can be written as the difference between two prime numbers not exceeding (). For example, the number 23 is a cluster prime becau ...

, an isolated prime, a Ramanujan prime, and a Higgs prime. 47 is also a supersingular prime. It is the last consecutive prime number that divides the order of at least one sporadic group.

In popular culture

Pomona College

Other

Late rapper Capital Steez was infatuated with the number 47 and what it meant spiritually. He believed the number 47 was the "perfect expression of balance in the world", representing the tension between the heart and the brain (the fourth and seventh chakras, respectively.) The number featured on the cover of ''AmeriKKKan Korruption'', stylized to resemble a swastika.

References

{{Integers, zero Integers In-jokes