258605779 has 6 divisors (see below), whose sum is σ = 262918500. Its totient is φ = 254362680.

The previous prime is 258605761. The next prime is 258605801. The reversal of 258605779 is 977506852.

258605779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 258605779 - 2⁷ = 258605651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258605719) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31029 + ... + 38470.

It is an arithmetic number, because the mean of its divisors is an integer number (43819750).

Almost surely, 2^258605779 is an apocalyptic number.

258605779 is a deficient number, since it is larger than the sum of its proper divisors (4312721).

258605779 is an frugal number, since it uses more digits than its factorization.

258605779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69621 (or 69560 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 49.

The square root of 258605779 is about 16081.2244247756. The cubic root of 258605779 is about 637.1075356505.

The spelling of 258605779 in words is "two hundred fifty-eight million, six hundred five thousand, seven hundred seventy-nine".