258291569 has 2 divisors, whose sum is σ = 258291570. Its totient is φ = 258291568.

The previous prime is 258291563. The next prime is 258291571. The reversal of 258291569 is 965192852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152201569 + 106090000 = 12337^2 + 10300^2 .

It is a cyclic number.

It is not a de Polignac number, because 258291569 - 2²⁴ = 241514353 is a prime.

It is a super-2 number, since 2×258291569² = 133429069232963522, which contains 22 as substring.

Together with 258291571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (258291563) 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 as a sum of consecutive naturals, namely, 129145784 + 129145785.

It is an arithmetic number, because the mean of its divisors is an integer number (129145785).

Almost surely, 2^258291569 is an apocalyptic number.

It is an amenable number.

258291569 is a deficient number, since it is larger than the sum of its proper divisors (1).

258291569 is an equidigital number, since it uses as much as digits as its factorization.

258291569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 47.

The square root of 258291569 is about 16071.4519879194. The cubic root of 258291569 is about 636.8493992566.

The spelling of 258291569 in words is "two hundred fifty-eight million, two hundred ninety-one thousand, five hundred sixty-nine".