258698161 has 2 divisors, whose sum is σ = 258698162. Its totient is φ = 258698160.

The previous prime is 258698149. The next prime is 258698171. The reversal of 258698161 is 161896852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 257409936 + 1288225 = 16044^2 + 1135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258698161 is a prime.

It is not a weakly prime, because it can be changed into another prime (258698101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129349080 + 129349081.

It is an arithmetic number, because the mean of its divisors is an integer number (129349081).

Almost surely, 2^258698161 is an apocalyptic number.

It is an amenable number.

258698161 is a deficient number, since it is larger than the sum of its proper divisors (1).

258698161 is an equidigital number, since it uses as much as digits as its factorization.

258698161 is an evil number, because the sum of its binary digits is even.

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

The square root of 258698161 is about 16084.0965242068. The cubic root of 258698161 is about 637.1833914717.

The spelling of 258698161 in words is "two hundred fifty-eight million, six hundred ninety-eight thousand, one hundred sixty-one".