258849779 has 4 divisors (see below), whose sum is σ = 263093280. Its totient is φ = 254606280.

The previous prime is 258849761. The next prime is 258849781. The reversal of 258849779 is 977948852.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258849779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (258849709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2121659 + ... + 2121780.

It is an arithmetic number, because the mean of its divisors is an integer number (65773320).

Almost surely, 2^258849779 is an apocalyptic number.

258849779 is a deficient number, since it is larger than the sum of its proper divisors (4243501).

258849779 is an equidigital number, since it uses as much as digits as its factorization.

258849779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4243500.

The product of its digits is 10160640, while the sum is 59.

The square root of 258849779 is about 16088.8091231141. The cubic root of 258849779 is about 637.3078474577.

The spelling of 258849779 in words is "two hundred fifty-eight million, eight hundred forty-nine thousand, seven hundred seventy-nine".