258668593 has 4 divisors (see below), whose sum is σ = 258729460. Its totient is φ = 258607728.

The previous prime is 258668581. The next prime is 258668623. The reversal of 258668593 is 395866852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 153462544 + 105206049 = 12388^2 + 10257^2 .

It is a cyclic number.

It is not a de Polignac number, because 258668593 - 2⁵ = 258668561 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 258668593.

It is not an unprimeable number, because it can be changed into a prime (258668563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23538 + ... + 32731.

It is an arithmetic number, because the mean of its divisors is an integer number (64682365).

Almost surely, 2^258668593 is an apocalyptic number.

It is an amenable number.

258668593 is a deficient number, since it is larger than the sum of its proper divisors (60867).

258668593 is an equidigital number, since it uses as much as digits as its factorization.

258668593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60866.

The product of its digits is 3110400, while the sum is 52.

The square root of 258668593 is about 16083.1773291225. The cubic root of 258668593 is about 637.1591148446.

The spelling of 258668593 in words is "two hundred fifty-eight million, six hundred sixty-eight thousand, five hundred ninety-three".