560818721 has 2 divisors, whose sum is σ = 560818722. Its totient is φ = 560818720.

The previous prime is 560818717. The next prime is 560818723. The reversal of 560818721 is 127818065.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 558802321 + 2016400 = 23639^2 + 1420^2 .

It is a cyclic number.

It is not a de Polignac number, because 560818721 - 2² = 560818717 is a prime.

Together with 560818723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (560818723) 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, 280409360 + 280409361.

It is an arithmetic number, because the mean of its divisors is an integer number (280409361).

Almost surely, 2^560818721 is an apocalyptic number.

It is an amenable number.

560818721 is a deficient number, since it is larger than the sum of its proper divisors (1).

560818721 is an equidigital number, since it uses as much as digits as its factorization.

560818721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 38.

The square root of 560818721 is about 23681.6114527707. The cubic root of 560818721 is about 824.6585527953.

The spelling of 560818721 in words is "five hundred sixty million, eight hundred eighteen thousand, seven hundred twenty-one".