509805373 has 16 divisors (see below), whose sum is σ = 663238656. Its totient is φ = 379977840.

The previous prime is 509805353. The next prime is 509805383. The reversal of 509805373 is 373508905.

It is a happy number.

It is not a de Polignac number, because 509805373 - 2⁵ = 509805341 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 (509805353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142161 + ... + 145702.

It is an arithmetic number, because the mean of its divisors is an integer number (41452416).

Almost surely, 2^509805373 is an apocalyptic number.

It is an amenable number.

509805373 is a deficient number, since it is larger than the sum of its proper divisors (153433283).

509805373 is a wasteful number, since it uses less digits than its factorization.

509805373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287904.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 509805373 is about 22578.8700558730. The cubic root of 509805373 is about 798.8553280430.

The spelling of 509805373 in words is "five hundred nine million, eight hundred five thousand, three hundred seventy-three".