43663441 has 4 divisors (see below), whose sum is σ = 44843572. Its totient is φ = 42483312.

The previous prime is 43663421. The next prime is 43663457. The reversal of 43663441 is 14436634.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14436634 = 2 ⋅7218317.

It can be written as a sum of positive squares in 2 ways, for example, as 39942400 + 3721041 = 6320^2 + 1929^2 .

It is a cyclic number.

It is not a de Polignac number, because 43663441 - 2⁹ = 43662929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43663421) 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, 590010 + ... + 590083.

It is an arithmetic number, because the mean of its divisors is an integer number (11210893).

Almost surely, 2^43663441 is an apocalyptic number.

It is an amenable number.

43663441 is a deficient number, since it is larger than the sum of its proper divisors (1180131).

43663441 is a wasteful number, since it uses less digits than its factorization.

43663441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180130.

The product of its digits is 20736, while the sum is 31.

The square root of 43663441 is about 6607.8317926533. The cubic root of 43663441 is about 352.1323995093.

The spelling of 43663441 in words is "forty-three million, six hundred sixty-three thousand, four hundred forty-one".