573075721 has 9 divisors (see below), whose sum is σ = 589894599. Its totient is φ = 556725384.

The previous prime is 573075707. The next prime is 573075731. The reversal of 573075721 is 127570375.

The square root of 573075721 is 23939.

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

It can be written as a sum of positive squares in only one way, i.e., 512796025 + 60279696 = 22645^2 + 7764^2 .

It is not a de Polignac number, because 573075721 - 2²⁵ = 539521289 is a prime.

It is a super-3 number, since 3×573075721³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (573075731) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 885420 + ... + 886066.

Almost surely, 2^573075721 is an apocalyptic number.

573075721 is the 23939-th square number.

573075721 is the 11970-th centered octagonal number.

It is an amenable number.

573075721 is a deficient number, since it is larger than the sum of its proper divisors (16818878).

573075721 is an frugal number, since it uses more digits than its factorization.

573075721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368 (or 684 counting only the distinct ones).

The product of its (nonzero) digits is 51450, while the sum is 37.

The cubic root of 573075721 is about 830.6230967323.

The spelling of 573075721 in words is "five hundred seventy-three million, seventy-five thousand, seven hundred twenty-one".