561599843 has 4 divisors (see below), whose sum is σ = 641828400. Its totient is φ = 481371288.

The previous prime is 561599821. The next prime is 561599849. The reversal of 561599843 is 348995165.

It is a happy number.

561599843 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, and also an emirpimes, since its reverse is a distinct semiprime: 348995165 = 5 ⋅69799033.

It is a cyclic number.

It is not a de Polignac number, because 561599843 - 2¹⁰ = 561598819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 561599791 and 561599800.

It is not an unprimeable number, because it can be changed into a prime (561599849) 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, 40114268 + ... + 40114281.

It is an arithmetic number, because the mean of its divisors is an integer number (160457100).

Almost surely, 2^561599843 is an apocalyptic number.

561599843 is a deficient number, since it is larger than the sum of its proper divisors (80228557).

561599843 is an equidigital number, since it uses as much as digits as its factorization.

561599843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80228556.

The product of its digits is 1166400, while the sum is 50.

The square root of 561599843 is about 23698.0978772559. The cubic root of 561599843 is about 825.0412433621.

The spelling of 561599843 in words is "five hundred sixty-one million, five hundred ninety-nine thousand, eight hundred forty-three".