853

853 is a prime number.

853 is formed from three consecutive Fibonacci numbers, in reverse order.

853 divides the sum of the first 853 prime numbers (2615298).

853 is the number of connected graphs with seven vertices.

853 has a representation as a sum of two squares: 853 = 18² + 23².

853 is the hypotenuse of a primitive Pythagorean triple: 853² = 205² + 828².

853 is the start of the smallest string of five consecutive cousin prime pairs.

The Transamerica Pyramid, the tallest skyscraper in San Francisco, has a structural height of 853 feet.

Source: Prime Curios!