509947265 has 8 divisors (see below), whose sum is σ = 613536768. Its totient is φ = 406891120.

The previous prime is 509947261. The next prime is 509947297. The reversal of 509947265 is 562749905.

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

It is not a de Polignac number, because 509947265 - 2² = 509947261 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509947261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131231 + ... + 135060.

It is an arithmetic number, because the mean of its divisors is an integer number (76692096).

Almost surely, 2^509947265 is an apocalyptic number.

It is an amenable number.

509947265 is a deficient number, since it is larger than the sum of its proper divisors (103589503).

509947265 is a wasteful number, since it uses less digits than its factorization.

509947265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266679.

The product of its (nonzero) digits is 680400, while the sum is 47.

The square root of 509947265 is about 22582.0119785638. The cubic root of 509947265 is about 798.9294351903.

The spelling of 509947265 in words is "five hundred nine million, nine hundred forty-seven thousand, two hundred sixty-five".