43990943 has 4 divisors (see below), whose sum is σ = 44712168. Its totient is φ = 43269720.

The previous prime is 43990907. The next prime is 43990967. The reversal of 43990943 is 34909934.

It is a happy number.

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 43990943 - 2¹⁴ = 43974559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43990943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43995943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360521 + ... + 360642.

It is an arithmetic number, because the mean of its divisors is an integer number (11178042).

Almost surely, 2^43990943 is an apocalyptic number.

43990943 is a deficient number, since it is larger than the sum of its proper divisors (721225).

43990943 is an equidigital number, since it uses as much as digits as its factorization.

43990943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721224.

The product of its (nonzero) digits is 104976, while the sum is 41.

The square root of 43990943 is about 6632.5668485135. The cubic root of 43990943 is about 353.0106088667.

The spelling of 43990943 in words is "forty-three million, nine hundred ninety thousand, nine hundred forty-three".