258505867 has 2 divisors, whose sum is σ = 258505868. Its totient is φ = 258505866.

The previous prime is 258505847. The next prime is 258505879. The reversal of 258505867 is 768505852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 258505867 - 2¹⁵ = 258473099 is a prime.

It is not a weakly prime, because it can be changed into another prime (258505847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129252933 + 129252934.

It is an arithmetic number, because the mean of its divisors is an integer number (129252934).

Almost surely, 2^258505867 is an apocalyptic number.

258505867 is a deficient number, since it is larger than the sum of its proper divisors (1).

258505867 is an equidigital number, since it uses as much as digits as its factorization.

258505867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672000, while the sum is 46.

The square root of 258505867 is about 16078.1176447991. The cubic root of 258505867 is about 637.0254765311.

The spelling of 258505867 in words is "two hundred fifty-eight million, five hundred five thousand, eight hundred sixty-seven".