43994047 has 4 divisors (see below), whose sum is σ = 44007840. Its totient is φ = 43980256.

The previous prime is 43994033. The next prime is 43994051. The reversal of 43994047 is 74049934.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 43994047 - 2²³ = 35605439 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43994017) 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, 618 + ... + 9400.

It is an arithmetic number, because the mean of its divisors is an integer number (11001960).

Almost surely, 2^43994047 is an apocalyptic number.

43994047 is a deficient number, since it is larger than the sum of its proper divisors (13793).

43994047 is an equidigital number, since it uses as much as digits as its factorization.

43994047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13792.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 43994047 is about 6632.8008412736. The cubic root of 43994047 is about 353.0189114784.

The spelling of 43994047 in words is "forty-three million, nine hundred ninety-four thousand, forty-seven".