43996689 has 45 divisors (see below), whose sum is σ = 73335801. Its totient is φ = 26266680.

The previous prime is 43996681. The next prime is 43996703. The reversal of 43996689 is 98669934.

It is a happy number.

The square root of 43996689 is 6633.

It is a perfect power (a square), and thus also a powerful number.

43996689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43996689 - 2³ = 43996681 is a prime.

Its product of digits (2519424) is a multiple of the sum of its prime divisors (81).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43996681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 656634 + ... + 656700.

Almost surely, 2^43996689 is an apocalyptic number.

43996689 is the 6633-rd square number.

43996689 is the 3317-th centered octagonal number.

It is an amenable number.

43996689 is a deficient number, since it is larger than the sum of its proper divisors (29339112).

43996689 is an equidigital number, since it uses as much as digits as its factorization.

43996689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168 (or 81 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The cubic root of 43996689 is about 353.0259780201.

The spelling of 43996689 in words is "forty-three million, nine hundred ninety-six thousand, six hundred eighty-nine".