500469938721 has 9 divisors (see below), whose sum is σ = 722904088179. Its totient is φ = 333645210936.

The previous prime is 500469938693. The next prime is 500469938783. The reversal of 500469938721 is 127839964005.

The square root of 500469938721 is 707439.

It is a perfect power (a square), and thus also a powerful number.

500469938721 is a `hidden beast` number, since 500 + 4 + 69 + 9 + 3 + 8 + 72 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10139483025 + 490330455696 = 100695^2 + 700236^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 500469938721 - 2⁹ = 500469938209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (500469938921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2004411 + ... + 2240223.

It is a 1-persistent number, because it is pandigital, but 2⋅500469938721 = 1000939877442 is not.

Almost surely, 2^500469938721 is an apocalyptic number.

500469938721 is the 707439-th square number.

500469938721 is the 353720-th centered octagonal number.

It is an amenable number.

500469938721 is a deficient number, since it is larger than the sum of its proper divisors (222434149458).

500469938721 is an frugal number, since it uses more digits than its factorization.

500469938721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471632 (or 235816 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 500469938721 in words is "five hundred billion, four hundred sixty-nine million, nine hundred thirty-eight thousand, seven hundred twenty-one".