230891 has 2 divisors, whose sum is σ = 230892. Its totient is φ = 230890.

The previous prime is 230873. The next prime is 230929. The reversal of 230891 is 198032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 230891 - 2⁶ = 230827 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (230861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115445 + 115446.

It is an arithmetic number, because the mean of its divisors is an integer number (115446).

2²³⁰⁸⁹¹ is an apocalyptic number.

230891 is a deficient number, since it is larger than the sum of its proper divisors (1).

230891 is an equidigital number, since it uses as much as digits as its factorization.

230891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 230891 is about 480.5111861341. The cubic root of 230891 is about 61.3482720648.

The spelling of 230891 in words is "two hundred thirty thousand, eight hundred ninety-one".