291 (number)

291 is the natural number following 290 and preceding 292.

In mathematics

• 291 is an odd composite number with two prime factors.
• 291 is a semiprime number meaning that it has 2 prime factors.
• 291 can be written as the sum of the nth prime plus n. It is the 52nd prime (239) plus 52.
• 291 is one of the positions of “c” in the tribonacci word ... defined by .
• 291 is the sum of six 4th powers. It is the sum of 4⁴+2⁴+2⁴+1⁴+1⁴+1⁴.

References