479538809 has 12 divisors (see below), whose sum is σ = 501343980. Its totient is φ = 458136000.

The previous prime is 479538781. The next prime is 479538817. The reversal of 479538809 is 908835974.

It can be written as a sum of positive squares in 6 ways, for example, as 218005225 + 261533584 = 14765^2 + 16172^2 .

It is a de Polignac number, because none of the positive numbers 2^k-479538809 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 (479538869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 295019 + ... + 296639.

It is an arithmetic number, because the mean of its divisors is an integer number (41778665).

Almost surely, 2^479538809 is an apocalyptic number.

It is an amenable number.

479538809 is a deficient number, since it is larger than the sum of its proper divisors (21805171).

479538809 is a wasteful number, since it uses less digits than its factorization.

479538809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852 (or 1751 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 479538809 is about 21898.3745743834. The cubic root of 479538809 is about 782.7226837502.

The spelling of 479538809 in words is "four hundred seventy-nine million, five hundred thirty-eight thousand, eight hundred nine".