509869797 has 16 divisors (see below), whose sum is σ = 721804032. Its totient is φ = 319034880.

The previous prime is 509869783. The next prime is 509869813. The reversal of 509869797 is 797968905.

It is not a de Polignac number, because 509869797 - 2¹² = 509865701 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 509869797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509869757) 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, 5097 + ... + 32337.

It is an arithmetic number, because the mean of its divisors is an integer number (45112752).

Almost surely, 2^509869797 is an apocalyptic number.

It is an amenable number.

509869797 is a deficient number, since it is larger than the sum of its proper divisors (211934235).

509869797 is a wasteful number, since it uses less digits than its factorization.

509869797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27628.

The product of its (nonzero) digits is 8573040, while the sum is 60.

The square root of 509869797 is about 22580.2966543843. The cubic root of 509869797 is about 798.8889770200. Note that the first 3 decimals are identical.

The spelling of 509869797 in words is "five hundred nine million, eight hundred sixty-nine thousand, seven hundred ninety-seven".