800291 has 2 divisors, whose sum is σ = 800292. Its totient is φ = 800290.

The previous prime is 800287. The next prime is 800311. The reversal of 800291 is 192008.

It is an a-pointer prime, because the next prime (800311) can be obtained adding 800291 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 800291 - 2² = 800287 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (800221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400145 + 400146.

It is an arithmetic number, because the mean of its divisors is an integer number (400146).

2⁸⁰⁰²⁹¹ is an apocalyptic number.

800291 is a deficient number, since it is larger than the sum of its proper divisors (1).

800291 is an equidigital number, since it uses as much as digits as its factorization.

800291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 800291 is about 894.5898501548. The cubic root of 800291 is about 92.8430311607.

Adding to 800291 its reverse (192008), we get a palindrome (992299).

The spelling of 800291 in words is "eight hundred thousand, two hundred ninety-one".