561489559 has 2 divisors, whose sum is σ = 561489560. Its totient is φ = 561489558.

The previous prime is 561489553. The next prime is 561489587. The reversal of 561489559 is 955984165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561489559 - 2¹⁹ = 560965271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561489553) 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, 280744779 + 280744780.

It is an arithmetic number, because the mean of its divisors is an integer number (280744780).

Almost surely, 2^561489559 is an apocalyptic number.

561489559 is a deficient number, since it is larger than the sum of its proper divisors (1).

561489559 is an equidigital number, since it uses as much as digits as its factorization.

561489559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944000, while the sum is 52.

The square root of 561489559 is about 23695.7709095948. The cubic root of 561489559 is about 824.9872340847.

The spelling of 561489559 in words is "five hundred sixty-one million, four hundred eighty-nine thousand, five hundred fifty-nine".