720564841 has 2 divisors, whose sum is σ = 720564842. Its totient is φ = 720564840.

The previous prime is 720564829. The next prime is 720564847. The reversal of 720564841 is 148465027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 477859600 + 242705241 = 21860^2 + 15579^2 .

It is a cyclic number.

It is not a de Polignac number, because 720564841 - 2²¹ = 718467689 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 720564841.

It is not a weakly prime, because it can be changed into another prime (720564847) 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, 360282420 + 360282421.

It is an arithmetic number, because the mean of its divisors is an integer number (360282421).

Almost surely, 2^720564841 is an apocalyptic number.

It is an amenable number.

720564841 is a deficient number, since it is larger than the sum of its proper divisors (1).

720564841 is an equidigital number, since it uses as much as digits as its factorization.

720564841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 720564841 is about 26843.3388571541. The cubic root of 720564841 is about 896.5152659314.

The spelling of 720564841 in words is "seven hundred twenty million, five hundred sixty-four thousand, eight hundred forty-one".