258416687 has 2 divisors, whose sum is σ = 258416688. Its totient is φ = 258416686.

The previous prime is 258416659. The next prime is 258416689. The reversal of 258416687 is 786614852.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258416687 is a prime.

Together with 258416689, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258416689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129208343 + 129208344.

It is an arithmetic number, because the mean of its divisors is an integer number (129208344).

Almost surely, 2^258416687 is an apocalyptic number.

258416687 is a deficient number, since it is larger than the sum of its proper divisors (1).

258416687 is an equidigital number, since it uses as much as digits as its factorization.

258416687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 47.

The square root of 258416687 is about 16075.3440709678. The cubic root of 258416687 is about 636.9522138921.

The spelling of 258416687 in words is "two hundred fifty-eight million, four hundred sixteen thousand, six hundred eighty-seven".