258439069 has 4 divisors (see below), whose sum is σ = 295358944. Its totient is φ = 221519196.

The previous prime is 258439019. The next prime is 258439091. The reversal of 258439069 is 960934852.

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 258439069 - 2¹¹ = 258437021 is a prime.

It is a super-2 number, since 2×258439069² = 133581504771173522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258439019) 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, 18459927 + ... + 18459940.

It is an arithmetic number, because the mean of its divisors is an integer number (73839736).

Almost surely, 2^258439069 is an apocalyptic number.

It is an amenable number.

258439069 is a deficient number, since it is larger than the sum of its proper divisors (36919875).

258439069 is an equidigital number, since it uses as much as digits as its factorization.

258439069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36919874.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 258439069 is about 16076.0402151774. The cubic root of 258439069 is about 636.9706026077.

The spelling of 258439069 in words is "two hundred fifty-eight million, four hundred thirty-nine thousand, sixty-nine".