509430879 has 12 divisors (see below), whose sum is σ = 736450000. Its totient is φ = 339341184.

The previous prime is 509430877. The next prime is 509430919. The reversal of 509430879 is 978034905.

It is not a de Polignac number, because 509430879 - 2¹ = 509430877 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 (509430871) 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, 11419 + ... + 33900.

Almost surely, 2^509430879 is an apocalyptic number.

509430879 is a deficient number, since it is larger than the sum of its proper divisors (227019121).

509430879 is a wasteful number, since it uses less digits than its factorization.

509430879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46574 (or 46571 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 509430879 is about 22570.5755132651. The cubic root of 509430879 is about 798.6596718003.

The spelling of 509430879 in words is "five hundred nine million, four hundred thirty thousand, eight hundred seventy-nine".