572646509 has 2 divisors, whose sum is σ = 572646510. Its totient is φ = 572646508.

The previous prime is 572646497. The next prime is 572646517. The reversal of 572646509 is 905646275.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 570015625 + 2630884 = 23875^2 + 1622^2 .

It is a cyclic number.

It is not a de Polignac number, because 572646509 - 2⁴ = 572646493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 572646509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (572646409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 286323254 + 286323255.

It is an arithmetic number, because the mean of its divisors is an integer number (286323255).

Almost surely, 2^572646509 is an apocalyptic number.

It is an amenable number.

572646509 is a deficient number, since it is larger than the sum of its proper divisors (1).

572646509 is an equidigital number, since it uses as much as digits as its factorization.

572646509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 572646509 is about 23930.0336188648. The cubic root of 572646509 is about 830.4156765320.

The spelling of 572646509 in words is "five hundred seventy-two million, six hundred forty-six thousand, five hundred nine".