509845745 has 8 divisors (see below), whose sum is σ = 616217280. Its totient is φ = 404941680.

The previous prime is 509845741. The next prime is 509845757. The reversal of 509845745 is 547548905.

It is a happy number.

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

It is not a de Polignac number, because 509845745 - 2² = 509845741 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 509845745.

It is not an unprimeable number, because it can be changed into a prime (509845741) 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, 366101 + ... + 367490.

It is an arithmetic number, because the mean of its divisors is an integer number (77027160).

Almost surely, 2^509845745 is an apocalyptic number.

It is an amenable number.

509845745 is a deficient number, since it is larger than the sum of its proper divisors (106371535).

509845745 is a wasteful number, since it uses less digits than its factorization.

509845745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733735.

The product of its (nonzero) digits is 1008000, while the sum is 47.

The square root of 509845745 is about 22579.7640598834. The cubic root of 509845745 is about 798.8764148719.

The spelling of 509845745 in words is "five hundred nine million, eight hundred forty-five thousand, seven hundred forty-five".