509969811 has 16 divisors (see below), whose sum is σ = 739113984. Its totient is φ = 310892064.

The previous prime is 509969797. The next prime is 509969813. The reversal of 509969811 is 118969905.

It is not a de Polignac number, because 509969811 - 2⁷ = 509969683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (509969813) 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, 56931 + ... + 65276.

It is an arithmetic number, because the mean of its divisors is an integer number (46194624).

Almost surely, 2^509969811 is an apocalyptic number.

509969811 is a deficient number, since it is larger than the sum of its proper divisors (229144173).

509969811 is a wasteful number, since it uses less digits than its factorization.

509969811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122330.

The product of its (nonzero) digits is 174960, while the sum is 48.

The square root of 509969811 is about 22582.5111756864. The cubic root of 509969811 is about 798.9412092166.

The spelling of 509969811 in words is "five hundred nine million, nine hundred sixty-nine thousand, eight hundred eleven".