579640869 has 12 divisors (see below), whose sum is σ = 838737900. Its totient is φ = 385744704.

The previous prime is 579640861. The next prime is 579640889. The reversal of 579640869 is 968046975.

579640869 is a `hidden beast` number, since 579 + 6 + 4 + 0 + 8 + 69 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 162868644 + 416772225 = 12762^2 + 20415^2 .

It is not a de Polignac number, because 579640869 - 2³ = 579640861 is a prime.

It is a super-2 number, since 2×579640869² = 671967074030150322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (579640861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51474 + ... + 61715.

It is an arithmetic number, because the mean of its divisors is an integer number (69894825).

Almost surely, 2^579640869 is an apocalyptic number.

It is an amenable number.

579640869 is a deficient number, since it is larger than the sum of its proper divisors (259097031).

579640869 is a wasteful number, since it uses less digits than its factorization.

579640869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113764 (or 113761 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 579640869 is about 24075.7319514901. The cubic root of 579640869 is about 833.7829300673.

It can be divided in two parts, 5796 and 40869, that added together give a triangular number (46665 = T₃₀₅).

The spelling of 579640869 in words is "five hundred seventy-nine million, six hundred forty thousand, eight hundred sixty-nine".