572993981 has 4 divisors (see below), whose sum is σ = 654850272. Its totient is φ = 491137692.

The previous prime is 572993929. The next prime is 572993989. The reversal of 572993981 is 189399275.

572993981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 572993981 - 2¹⁰ = 572992957 is a prime.

It is a super-2 number, since 2×572993981² = 656644204524456722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (572993989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40928135 + ... + 40928148.

It is an arithmetic number, because the mean of its divisors is an integer number (163712568).

Almost surely, 2^572993981 is an apocalyptic number.

It is an amenable number.

572993981 is a deficient number, since it is larger than the sum of its proper divisors (81856291).

572993981 is an equidigital number, since it uses as much as digits as its factorization.

572993981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81856290.

The product of its digits is 1224720, while the sum is 53.

The square root of 572993981 is about 23937.2926831753. The cubic root of 572993981 is about 830.5836031961.

The spelling of 572993981 in words is "five hundred seventy-two million, nine hundred ninety-three thousand, nine hundred eighty-one".