258657423 has 4 divisors (see below), whose sum is σ = 344876568. Its totient is φ = 172438280.

The previous prime is 258657391. The next prime is 258657433. The reversal of 258657423 is 324756852.

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

It is a cyclic number.

It is not a de Polignac number, because 258657423 - 2⁵ = 258657391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258657433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43109568 + ... + 43109573.

It is an arithmetic number, because the mean of its divisors is an integer number (86219142).

Almost surely, 2^258657423 is an apocalyptic number.

258657423 is a deficient number, since it is larger than the sum of its proper divisors (86219145).

258657423 is an equidigital number, since it uses as much as digits as its factorization.

258657423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86219144.

The product of its digits is 403200, while the sum is 42.

The square root of 258657423 is about 16082.8300681192. The cubic root of 258657423 is about 637.1499433024.

The spelling of 258657423 in words is "two hundred fifty-eight million, six hundred fifty-seven thousand, four hundred twenty-three".