258668497 has 2 divisors, whose sum is σ = 258668498. Its totient is φ = 258668496.

The previous prime is 258668491. The next prime is 258668551. The reversal of 258668497 is 794866852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232135696 + 26532801 = 15236^2 + 5151^2 .

It is a cyclic number.

It is not a de Polignac number, because 258668497 - 2¹⁹ = 258144209 is a prime.

It is not a weakly prime, because it can be changed into another prime (258668491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129334248 + 129334249.

It is an arithmetic number, because the mean of its divisors is an integer number (129334249).

Almost surely, 2^258668497 is an apocalyptic number.

It is an amenable number.

258668497 is a deficient number, since it is larger than the sum of its proper divisors (1).

258668497 is an equidigital number, since it uses as much as digits as its factorization.

258668497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 55.

The square root of 258668497 is about 16083.1743446373. The cubic root of 258668497 is about 637.1590360214.

The spelling of 258668497 in words is "two hundred fifty-eight million, six hundred sixty-eight thousand, four hundred ninety-seven".