561224789 has 2 divisors, whose sum is σ = 561224790. Its totient is φ = 561224788.

The previous prime is 561224779. The next prime is 561224887. The reversal of 561224789 is 987422165.

It is a happy number.

561224789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 473802289 + 87422500 = 21767^2 + 9350^2 .

It is a cyclic number.

It is not a de Polignac number, because 561224789 - 2²⁴ = 544447573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561224779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280612394 + 280612395.

It is an arithmetic number, because the mean of its divisors is an integer number (280612395).

Almost surely, 2^561224789 is an apocalyptic number.

It is an amenable number.

561224789 is a deficient number, since it is larger than the sum of its proper divisors (1).

561224789 is an equidigital number, since it uses as much as digits as its factorization.

561224789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 44.

The square root of 561224789 is about 23690.1833889060. The cubic root of 561224789 is about 824.8575396500.

The spelling of 561224789 in words is "five hundred sixty-one million, two hundred twenty-four thousand, seven hundred eighty-nine".