206291 has 2 divisors, whose sum is σ = 206292. Its totient is φ = 206290.

The previous prime is 206281. The next prime is 206299. The reversal of 206291 is 192602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 206291 - 2¹⁰ = 205267 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (206299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103145 + 103146.

It is an arithmetic number, because the mean of its divisors is an integer number (103146).

2²⁰⁶²⁹¹ is an apocalyptic number.

206291 is a deficient number, since it is larger than the sum of its proper divisors (1).

206291 is an equidigital number, since it uses as much as digits as its factorization.

206291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 206291 is about 454.1926903859. The cubic root of 206291 is about 59.0872022778.

Adding to 206291 its reverse (192602), we get a palindrome (398893).

Subtracting from 206291 its reverse (192602), we obtain a square (13689 = 117²).

The spelling of 206291 in words is "two hundred six thousand, two hundred ninety-one".