43961563 has 4 divisors (see below), whose sum is σ = 44396928. Its totient is φ = 43526200.

The previous prime is 43961557. The next prime is 43961597. The reversal of 43961563 is 36516934.

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 43961563 - 2¹⁷ = 43830491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43961543) 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, 217531 + ... + 217732.

It is an arithmetic number, because the mean of its divisors is an integer number (11099232).

Almost surely, 2^43961563 is an apocalyptic number.

43961563 is a deficient number, since it is larger than the sum of its proper divisors (435365).

43961563 is a wasteful number, since it uses less digits than its factorization.

43961563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435364.

The product of its digits is 58320, while the sum is 37.

The square root of 43961563 is about 6630.3516497996. The cubic root of 43961563 is about 352.9320035846.

The spelling of 43961563 in words is "forty-three million, nine hundred sixty-one thousand, five hundred sixty-three".