868291 has 2 divisors, whose sum is σ = 868292. Its totient is φ = 868290.

The previous prime is 868277. The next prime is 868313. The reversal of 868291 is 192868.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868291 is a prime.

It is equal to p₆₈₉₆₅ and since 868291 and 68965 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (868211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434145 + 434146.

It is an arithmetic number, because the mean of its divisors is an integer number (434146).

2⁸⁶⁸²⁹¹ is an apocalyptic number.

868291 is a deficient number, since it is larger than the sum of its proper divisors (1).

868291 is an equidigital number, since it uses as much as digits as its factorization.

868291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 34.

The square root of 868291 is about 931.8213348062. The cubic root of 868291 is about 95.4014772980.

The spelling of 868291 in words is "eight hundred sixty-eight thousand, two hundred ninety-one".