258455863 has 2 divisors, whose sum is σ = 258455864. Its totient is φ = 258455862.

The previous prime is 258455851. The next prime is 258455881. The reversal of 258455863 is 368554852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 258455863 - 2⁵ = 258455831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258455563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129227931 + 129227932.

It is an arithmetic number, because the mean of its divisors is an integer number (129227932).

Almost surely, 2^258455863 is an apocalyptic number.

258455863 is a deficient number, since it is larger than the sum of its proper divisors (1).

258455863 is an equidigital number, since it uses as much as digits as its factorization.

258455863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152000, while the sum is 46.

The square root of 258455863 is about 16076.5625368112. The cubic root of 258455863 is about 636.9843996091.

The spelling of 258455863 in words is "two hundred fifty-eight million, four hundred fifty-five thousand, eight hundred sixty-three".