561184009 has 2 divisors, whose sum is σ = 561184010. Its totient is φ = 561184008.

The previous prime is 561184007. The next prime is 561184033. The reversal of 561184009 is 900481165.

561184009 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., 485232784 + 75951225 = 22028^2 + 8715^2 .

It is a cyclic number.

It is not a de Polignac number, because 561184009 - 2¹ = 561184007 is a prime.

Together with 561184007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (561184003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280592004 + 280592005.

It is an arithmetic number, because the mean of its divisors is an integer number (280592005).

Almost surely, 2^561184009 is an apocalyptic number.

It is an amenable number.

561184009 is a deficient number, since it is larger than the sum of its proper divisors (1).

561184009 is an equidigital number, since it uses as much as digits as its factorization.

561184009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 561184009 is about 23689.3226792156. The cubic root of 561184009 is about 824.8375604273.

The spelling of 561184009 in words is "five hundred sixty-one million, one hundred eighty-four thousand, nine".