258755869 has 2 divisors, whose sum is σ = 258755870. Its totient is φ = 258755868.

The previous prime is 258755843. The next prime is 258755899. The reversal of 258755869 is 968557852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236759769 + 21996100 = 15387^2 + 4690^2 .

It is a cyclic number.

It is not a de Polignac number, because 258755869 - 2⁷ = 258755741 is a prime.

It is a super-2 number, since 2×258755869² = 133909199483890322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258755899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129377934 + 129377935.

It is an arithmetic number, because the mean of its divisors is an integer number (129377935).

Almost surely, 2^258755869 is an apocalyptic number.

It is an amenable number.

258755869 is a deficient number, since it is larger than the sum of its proper divisors (1).

258755869 is an equidigital number, since it uses as much as digits as its factorization.

258755869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048000, while the sum is 55.

The square root of 258755869 is about 16085.8903701349. The cubic root of 258755869 is about 637.2307669474.

The spelling of 258755869 in words is "two hundred fifty-eight million, seven hundred fifty-five thousand, eight hundred sixty-nine".