509244845 has 4 divisors (see below), whose sum is σ = 611093820. Its totient is φ = 407395872.

The previous prime is 509244761. The next prime is 509244851. The reversal of 509244845 is 548442905.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 395651881 + 113592964 = 19891^2 + 10658^2 .

It is a cyclic number.

It is not a de Polignac number, because 509244845 - 2²⁸ = 240809389 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50924480 + ... + 50924489.

It is an arithmetic number, because the mean of its divisors is an integer number (152773455).

Almost surely, 2^509244845 is an apocalyptic number.

It is an amenable number.

509244845 is a deficient number, since it is larger than the sum of its proper divisors (101848975).

509244845 is a wasteful number, since it uses less digits than its factorization.

509244845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101848974.

The product of its (nonzero) digits is 230400, while the sum is 41.

The square root of 509244845 is about 22566.4539748716. The cubic root of 509244845 is about 798.5624417677.

The spelling of 509244845 in words is "five hundred nine million, two hundred forty-four thousand, eight hundred forty-five".