530402509 has 20 divisors (see below), whose sum is σ = 666402716. Its totient is φ = 419634432.

The previous prime is 530402497. The next prime is 530402513. The reversal of 530402509 is 905204035.

It can be written as a sum of positive squares in 2 ways, for example, as 76073284 + 454329225 = 8722^2 + 21315^2 .

It is not a de Polignac number, because 530402509 - 2²⁷ = 396184781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (530402519) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 22717 + ... + 39709.

Almost surely, 2^530402509 is an apocalyptic number.

It is an amenable number.

530402509 is a deficient number, since it is larger than the sum of its proper divisors (136000207).

530402509 is an equidigital number, since it uses as much as digits as its factorization.

530402509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17034 (or 17013 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 530402509 is about 23030.4691441577. The cubic root of 530402509 is about 809.4720478712.

The spelling of 530402509 in words is "five hundred thirty million, four hundred two thousand, five hundred nine".