561924889 has 4 divisors (see below), whose sum is σ = 562302756. Its totient is φ = 561547024.

The previous prime is 561924887. The next prime is 561924901. The reversal of 561924889 is 988429165.

561924889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 473715225 + 88209664 = 21765^2 + 9392^2 .

It is a cyclic number.

It is not a de Polignac number, because 561924889 - 2¹ = 561924887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561924887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186694 + ... + 189679.

It is an arithmetic number, because the mean of its divisors is an integer number (140575689).

Almost surely, 2^561924889 is an apocalyptic number.

It is an amenable number.

561924889 is a deficient number, since it is larger than the sum of its proper divisors (377867).

561924889 is a wasteful number, since it uses less digits than its factorization.

561924889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377866.

The product of its digits is 1244160, while the sum is 52.

The square root of 561924889 is about 23704.9549461711. The cubic root of 561924889 is about 825.2003867077.

The spelling of 561924889 in words is "five hundred sixty-one million, nine hundred twenty-four thousand, eight hundred eighty-nine".