530042509 has 4 divisors (see below), whose sum is σ = 531426816. Its totient is φ = 528658204.

The previous prime is 530042497. The next prime is 530042533. The reversal of 530042509 is 905240035.

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.

It is a cyclic number.

It is not a de Polignac number, because 530042509 - 2²³ = 521653901 is a prime.

It is a super-2 number, since 2×530042509² = 561890122694030162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (530042809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 691579 + ... + 692344.

It is an arithmetic number, because the mean of its divisors is an integer number (132856704).

Almost surely, 2^530042509 is an apocalyptic number.

It is an amenable number.

530042509 is a deficient number, since it is larger than the sum of its proper divisors (1384307).

530042509 is a wasteful number, since it uses less digits than its factorization.

530042509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1384306.

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

The square root of 530042509 is about 23022.6520844146. The cubic root of 530042509 is about 809.2888688159.

The spelling of 530042509 in words is "five hundred thirty million, forty-two thousand, five hundred nine".