258991 has 2 divisors, whose sum is σ = 258992. Its totient is φ = 258990.

The previous prime is 258983. The next prime is 259001. The reversal of 258991 is 199852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 258991 - 2³ = 258983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129495 + 129496.

It is an arithmetic number, because the mean of its divisors is an integer number (129496).

2²⁵⁸⁹⁹¹ is an apocalyptic number.

258991 is a deficient number, since it is larger than the sum of its proper divisors (1).

258991 is an equidigital number, since it uses as much as digits as its factorization.

258991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 34.

The square root of 258991 is about 508.9115836764. The cubic root of 258991 is about 63.7423725335.

The spelling of 258991 in words is "two hundred fifty-eight thousand, nine hundred ninety-one".