561833983 has 4 divisors (see below), whose sum is σ = 562117320. Its totient is φ = 561550648.

The previous prime is 561833981. The next prime is 561833989. The reversal of 561833983 is 389338165.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561833983 - 2¹ = 561833981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561833981) 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, 138673 + ... + 142666.

It is an arithmetic number, because the mean of its divisors is an integer number (140529330).

Almost surely, 2^561833983 is an apocalyptic number.

561833983 is a deficient number, since it is larger than the sum of its proper divisors (283337).

561833983 is a wasteful number, since it uses less digits than its factorization.

561833983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283336.

The product of its digits is 466560, while the sum is 46.

The square root of 561833983 is about 23703.0374213939. The cubic root of 561833983 is about 825.1558850827.

It can be divided in two parts, 5618 and 33983, that added together give a square (39601 = 199²).

The spelling of 561833983 in words is "five hundred sixty-one million, eight hundred thirty-three thousand, nine hundred eighty-three".