572423861 has 2 divisors, whose sum is σ = 572423862. Its totient is φ = 572423860.

The previous prime is 572423843. The next prime is 572423893. The reversal of 572423861 is 168324275.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 570923236 + 1500625 = 23894^2 + 1225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-572423861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (572423821) 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 as a sum of consecutive naturals, namely, 286211930 + 286211931.

It is an arithmetic number, because the mean of its divisors is an integer number (286211931).

Almost surely, 2^572423861 is an apocalyptic number.

It is an amenable number.

572423861 is a deficient number, since it is larger than the sum of its proper divisors (1).

572423861 is an equidigital number, since it uses as much as digits as its factorization.

572423861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 38.

The square root of 572423861 is about 23925.3811045927. The cubic root of 572423861 is about 830.3080392409.

The spelling of 572423861 in words is "five hundred seventy-two million, four hundred twenty-three thousand, eight hundred sixty-one".