258161689 has 2 divisors, whose sum is σ = 258161690. Its totient is φ = 258161688.

The previous prime is 258161681. The next prime is 258161693. The reversal of 258161689 is 986161852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 249798025 + 8363664 = 15805^2 + 2892^2 .

It is a cyclic number.

It is not a de Polignac number, because 258161689 - 2³ = 258161681 is a prime.

It is not a weakly prime, because it can be changed into another prime (258161681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129080844 + 129080845.

It is an arithmetic number, because the mean of its divisors is an integer number (129080845).

Almost surely, 2^258161689 is an apocalyptic number.

It is an amenable number.

258161689 is a deficient number, since it is larger than the sum of its proper divisors (1).

258161689 is an equidigital number, since it uses as much as digits as its factorization.

258161689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 46.

The square root of 258161689 is about 16067.4107746083. The cubic root of 258161689 is about 636.7426363604.

The spelling of 258161689 in words is "two hundred fifty-eight million, one hundred sixty-one thousand, six hundred eighty-nine".