572789921 has 12 divisors (see below), whose sum is σ = 641481876. Its totient is φ = 510887520.

The previous prime is 572789909. The next prime is 572789923. The reversal of 572789921 is 129987275.

It can be written as a sum of positive squares in 2 ways, for example, as 327429025 + 245360896 = 18095^2 + 15664^2 .

It is not a de Polignac number, because 572789921 - 2¹⁸ = 572527777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 572789921.

It is not an unprimeable number, because it can be changed into a prime (572789923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38246 + ... + 51071.

It is an arithmetic number, because the mean of its divisors is an integer number (53456823).

Almost surely, 2^572789921 is an apocalyptic number.

It is an amenable number.

572789921 is a deficient number, since it is larger than the sum of its proper divisors (68691955).

572789921 is a wasteful number, since it uses less digits than its factorization.

572789921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89392 (or 89381 counting only the distinct ones).

The product of its digits is 635040, while the sum is 50.

The square root of 572789921 is about 23933.0299168325. The cubic root of 572789921 is about 830.4849930771.

The spelling of 572789921 in words is "five hundred seventy-two million, seven hundred eighty-nine thousand, nine hundred twenty-one".