258505393 has 4 divisors (see below), whose sum is σ = 272110960. Its totient is φ = 244899828.

The previous prime is 258505361. The next prime is 258505411. The reversal of 258505393 is 393505852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 258505393 - 2⁵ = 258505361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258505343) 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, 6802755 + ... + 6802792.

It is an arithmetic number, because the mean of its divisors is an integer number (68027740).

Almost surely, 2^258505393 is an apocalyptic number.

It is an amenable number.

258505393 is a deficient number, since it is larger than the sum of its proper divisors (13605567).

258505393 is a wasteful number, since it uses less digits than its factorization.

258505393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13605566.

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 258505393 is about 16078.1029042608. The cubic root of 258505393 is about 637.0250871779.

The spelling of 258505393 in words is "two hundred fifty-eight million, five hundred five thousand, three hundred ninety-three".