258984661 has 16 divisors (see below), whose sum is σ = 282412480. Its totient is φ = 236079360.

The previous prime is 258984653. The next prime is 258984667. The reversal of 258984661 is 166489852.

It is a cyclic number.

It is not a de Polignac number, because 258984661 - 2³ = 258984653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258984667) 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 in 15 ways as a sum of consecutive naturals, for example, 597901 + ... + 598333.

It is an arithmetic number, because the mean of its divisors is an integer number (17650780).

Almost surely, 2^258984661 is an apocalyptic number.

It is an amenable number.

258984661 is a deficient number, since it is larger than the sum of its proper divisors (23427819).

258984661 is a wasteful number, since it uses less digits than its factorization.

258984661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916.

The product of its digits is 829440, while the sum is 49.

The square root of 258984661 is about 16093.0003728329. Note that the first 3 decimals coincide. The cubic root of 258984661 is about 637.4185248176.

The spelling of 258984661 in words is "two hundred fifty-eight million, nine hundred eighty-four thousand, six hundred sixty-one".