258378863 has 2 divisors, whose sum is σ = 258378864. Its totient is φ = 258378862.

The previous prime is 258378847. The next prime is 258378871. The reversal of 258378863 is 368873852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 258378863 - 2⁴ = 258378847 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258378163) 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, 129189431 + 129189432.

It is an arithmetic number, because the mean of its divisors is an integer number (129189432).

Almost surely, 2^258378863 is an apocalyptic number.

258378863 is a deficient number, since it is larger than the sum of its proper divisors (1).

258378863 is an equidigital number, since it uses as much as digits as its factorization.

258378863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1935360, while the sum is 50.

The square root of 258378863 is about 16074.1675678711. The cubic root of 258378863 is about 636.9211358473.

The spelling of 258378863 in words is "two hundred fifty-eight million, three hundred seventy-eight thousand, eight hundred sixty-three".