561963 has 8 divisors (see below), whose sum is σ = 788800. Its totient is φ = 354888.

The previous prime is 561961. The next prime is 561973. The reversal of 561963 is 369165.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561963 - 2¹ = 561961 is a prime.

It is a Duffinian number.

561963 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 561963.

It is not an unprimeable number, because it can be changed into a prime (561961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4873 + ... + 4986.

It is an arithmetic number, because the mean of its divisors is an integer number (98600).

2⁵⁶¹⁹⁶³ is an apocalyptic number.

561963 is a deficient number, since it is larger than the sum of its proper divisors (226837).

561963 is a wasteful number, since it uses less digits than its factorization.

561963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9881.

The product of its digits is 4860, while the sum is 30.

The square root of 561963 is about 749.6419145165. The cubic root of 561963 is about 82.5219041930.

The spelling of 561963 in words is "five hundred sixty-one thousand, nine hundred sixty-three".