258986491 has 4 divisors (see below), whose sum is σ = 259018992. Its totient is φ = 258953992.

The previous prime is 258986471. The next prime is 258986521. The reversal of 258986491 is 194689852.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 258986491 - 2²³ = 250597883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258986471) 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, 4746 + ... + 23248.

It is an arithmetic number, because the mean of its divisors is an integer number (64754748).

Almost surely, 2^258986491 is an apocalyptic number.

258986491 is a deficient number, since it is larger than the sum of its proper divisors (32501).

258986491 is a wasteful number, since it uses less digits than its factorization.

258986491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32500.

The product of its digits is 1244160, while the sum is 52.

The square root of 258986491 is about 16093.0572297497. The cubic root of 258986491 is about 637.4200261590.

The spelling of 258986491 in words is "two hundred fifty-eight million, nine hundred eighty-six thousand, four hundred ninety-one".