43985563 has 8 divisors (see below), whose sum is σ = 45382032. Its totient is φ = 42600096.

The previous prime is 43985549. The next prime is 43985573. The reversal of 43985563 is 36558934.

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

It is a cyclic number.

It is not a de Polignac number, because 43985563 - 2⁵ = 43985531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43985573) 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, 5781 + ... + 11017.

It is an arithmetic number, because the mean of its divisors is an integer number (5672754).

Almost surely, 2^43985563 is an apocalyptic number.

43985563 is a deficient number, since it is larger than the sum of its proper divisors (1396469).

43985563 is a wasteful number, since it uses less digits than its factorization.

43985563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5501.

The product of its digits is 388800, while the sum is 43.

The square root of 43985563 is about 6632.1612616100. The cubic root of 43985563 is about 352.9962174611.

The spelling of 43985563 in words is "forty-three million, nine hundred eighty-five thousand, five hundred sixty-three".