258590491 has 4 divisors (see below), whose sum is σ = 259620984. Its totient is φ = 257560000.

The previous prime is 258590429. The next prime is 258590533. The reversal of 258590491 is 194095852.

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 258590491 - 2⁷ = 258590363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258590191) 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, 514870 + ... + 515371.

It is an arithmetic number, because the mean of its divisors is an integer number (64905246).

Almost surely, 2^258590491 is an apocalyptic number.

258590491 is a deficient number, since it is larger than the sum of its proper divisors (1030493).

258590491 is a wasteful number, since it uses less digits than its factorization.

258590491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030492.

The product of its (nonzero) digits is 129600, while the sum is 43.

The square root of 258590491 is about 16080.7490808109. The cubic root of 258590491 is about 637.0949807726.

It can be divided in two parts, 258590 and 491, that added together give a square (259081 = 509²).

The spelling of 258590491 in words is "two hundred fifty-eight million, five hundred ninety thousand, four hundred ninety-one".