258913991 has 12 divisors (see below), whose sum is σ = 305315712. Its totient is φ = 218883168.

The previous prime is 258913987. The next prime is 258914003. The reversal of 258913991 is 199319852.

It is not a de Polignac number, because 258913991 - 2² = 258913987 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258913091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32615 + ... + 39768.

It is an arithmetic number, because the mean of its divisors is an integer number (25442976).

Almost surely, 2^258913991 is an apocalyptic number.

258913991 is a deficient number, since it is larger than the sum of its proper divisors (46401721).

258913991 is an equidigital number, since it uses as much as digits as its factorization.

258913991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72470 (or 72463 counting only the distinct ones).

The product of its digits is 174960, while the sum is 47.

The square root of 258913991 is about 16090.8045479398. The cubic root of 258913991 is about 637.3605413771.

The spelling of 258913991 in words is "two hundred fifty-eight million, nine hundred thirteen thousand, nine hundred ninety-one".