509047117 has 4 divisors (see below), whose sum is σ = 509546716. Its totient is φ = 508547520.

The previous prime is 509047087. The next prime is 509047129. The reversal of 509047117 is 711740905.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 711740905 = 5 ⋅142348181.

It can be written as a sum of positive squares in 2 ways, for example, as 383024041 + 126023076 = 19571^2 + 11226^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509047117 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 (509044117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248268 + ... + 250309.

It is an arithmetic number, because the mean of its divisors is an integer number (127386679).

Almost surely, 2^509047117 is an apocalyptic number.

It is an amenable number.

509047117 is a deficient number, since it is larger than the sum of its proper divisors (499599).

509047117 is a wasteful number, since it uses less digits than its factorization.

509047117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499598.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 509047117 is about 22562.0725333468. The cubic root of 509047117 is about 798.4590739434.

The spelling of 509047117 in words is "five hundred nine million, forty-seven thousand, one hundred seventeen".