509398647 has 8 divisors (see below), whose sum is σ = 697555056. Its totient is φ = 330420672.

The previous prime is 509398579. The next prime is 509398657. The reversal of 509398647 is 746893905.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 509398647 - 2²³ = 501010039 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 509398647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509398657) 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 7 ways as a sum of consecutive naturals, for example, 2294478 + ... + 2294699.

It is an arithmetic number, because the mean of its divisors is an integer number (87194382).

Almost surely, 2^509398647 is an apocalyptic number.

509398647 is a deficient number, since it is larger than the sum of its proper divisors (188156409).

509398647 is a wasteful number, since it uses less digits than its factorization.

509398647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4589217.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 509398647 is about 22569.8614749847. The cubic root of 509398647 is about 798.6428275515.

It can be divided in two parts, 5093 and 98647, that added together give a triangular number (103740 = T₄₅₅).

The spelling of 509398647 in words is "five hundred nine million, three hundred ninety-eight thousand, six hundred forty-seven".