561204889 has 6 divisors (see below), whose sum is σ = 652830234. Its totient is φ = 481032720.

The previous prime is 561204887. The next prime is 561204893. The reversal of 561204889 is 988402165.

It is a happy number.

561204889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 551545225 + 9659664 = 23485^2 + 3108^2 .

It is not a de Polignac number, because 561204889 - 2¹ = 561204887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (561204883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5726532 + ... + 5726629.

It is an arithmetic number, because the mean of its divisors is an integer number (108805039).

Almost surely, 2^561204889 is an apocalyptic number.

It is an amenable number.

561204889 is a deficient number, since it is larger than the sum of its proper divisors (91625345).

561204889 is a wasteful number, since it uses less digits than its factorization.

561204889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11453175 (or 11453168 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 561204889 is about 23689.7633799918. The cubic root of 561204889 is about 824.8477902238.

It can be divided in two parts, 56120 and 4889, that added together give a square (61009 = 247²).

The spelling of 561204889 in words is "five hundred sixty-one million, two hundred four thousand, eight hundred eighty-nine".