293 (number)

293 is the natural number following 292 and preceding 294.

In mathematics

293 is:

• a prime number,
• a Pythagorean prime,
• a Sophie Germain prime
• a Chen prime
• strictly trivially polygonal (number n that is polygonal in only 2 ways: 2-gonal and n-gonal)
• equivalent to the sum of the first three tetradic primes. Tetradic numbers are numbers that are the same if written backwards, flipped upside-down, or mirrored upside-down and tetradic primes are tetradic numbers that are also prime. It is the sum of 11 + 101 + 181.
• the sum of perfect cubes 2³+2³+3³+5³+5³

References