561890743 has 16 divisors (see below), whose sum is σ = 603665920. Its totient is φ = 521427456.

The previous prime is 561890729. The next prime is 561890753. The reversal of 561890743 is 347098165.

It is a cyclic number.

It is not a de Polignac number, because 561890743 - 2⁵ = 561890711 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561890743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561890753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244546 + ... + 246832.

It is an arithmetic number, because the mean of its divisors is an integer number (37729120).

Almost surely, 2^561890743 is an apocalyptic number.

561890743 is a deficient number, since it is larger than the sum of its proper divisors (41775177).

561890743 is a wasteful number, since it uses less digits than its factorization.

With its successor (561890744) it forms an eRAP, since the sums of their prime factors are consecutive (2566 and 2567).

561890743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2566.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 561890743 is about 23704.2347060604. The cubic root of 561890743 is about 825.1836716249.

The spelling of 561890743 in words is "five hundred sixty-one million, eight hundred ninety thousand, seven hundred forty-three".