258243859 has 2 divisors, whose sum is σ = 258243860. Its totient is φ = 258243858.

The previous prime is 258243833. The next prime is 258243863. The reversal of 258243859 is 958342852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 258243859 - 2⁷ = 258243731 is a prime.

It is a super-2 number, since 2×258243859² = 133379781422423762, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (258243829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129121929 + 129121930.

It is an arithmetic number, because the mean of its divisors is an integer number (129121930).

Almost surely, 2^258243859 is an apocalyptic number.

258243859 is a deficient number, since it is larger than the sum of its proper divisors (1).

258243859 is an equidigital number, since it uses as much as digits as its factorization.

258243859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691200, while the sum is 46.

The square root of 258243859 is about 16069.9676104216. The cubic root of 258243859 is about 636.8101852320.

The spelling of 258243859 in words is "two hundred fifty-eight million, two hundred forty-three thousand, eight hundred fifty-nine".