258397391 has 8 divisors (see below), whose sum is σ = 297268224. Its totient is φ = 220015800.

The previous prime is 258397361. The next prime is 258397411. The reversal of 258397391 is 193793852.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 258397391 - 2⁶ = 258397327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258397361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121175 + ... + 123288.

It is an arithmetic number, because the mean of its divisors is an integer number (37158528).

Almost surely, 2^258397391 is an apocalyptic number.

258397391 is a deficient number, since it is larger than the sum of its proper divisors (38870833).

258397391 is a wasteful number, since it uses less digits than its factorization.

258397391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244621.

The product of its digits is 408240, while the sum is 47.

The square root of 258397391 is about 16074.7438859846. The cubic root of 258397391 is about 636.9363597355.

The spelling of 258397391 in words is "two hundred fifty-eight million, three hundred ninety-seven thousand, three hundred ninety-one".