509085589 has 4 divisors (see below), whose sum is σ = 509130720. Its totient is φ = 509040460.

The previous prime is 509085583. The next prime is 509085593. The reversal of 509085589 is 985580905.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 509085589 - 2²⁷ = 374867861 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 (509085583) 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, 10824 + ... + 33694.

It is an arithmetic number, because the mean of its divisors is an integer number (127282680).

Almost surely, 2^509085589 is an apocalyptic number.

It is an amenable number.

509085589 is a deficient number, since it is larger than the sum of its proper divisors (45131).

509085589 is a wasteful number, since it uses less digits than its factorization.

509085589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45130.

The product of its (nonzero) digits is 648000, while the sum is 49.

The square root of 509085589 is about 22562.9250984884. The cubic root of 509085589 is about 798.4791883511.

The spelling of 509085589 in words is "five hundred nine million, eighty-five thousand, five hundred eighty-nine".