509475965 has 8 divisors (see below), whose sum is σ = 621394008. Its totient is φ = 400898880.

The previous prime is 509475943. The next prime is 509475971. The reversal of 509475965 is 569574905.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 49716601 + 459759364 = 7051^2 + 21442^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-509475965 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 834902 + ... + 835511.

It is an arithmetic number, because the mean of its divisors is an integer number (77674251).

Almost surely, 2^509475965 is an apocalyptic number.

It is an amenable number.

509475965 is a deficient number, since it is larger than the sum of its proper divisors (111918043).

509475965 is a wasteful number, since it uses less digits than its factorization.

509475965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670479.

The product of its (nonzero) digits is 1701000, while the sum is 50.

The square root of 509475965 is about 22571.5742694213. The cubic root of 509475965 is about 798.6832322801.

The spelling of 509475965 in words is "five hundred nine million, four hundred seventy-five thousand, nine hundred sixty-five".