43994247 has 16 divisors (see below), whose sum is σ = 66199680. Its totient is φ = 25743200.

The previous prime is 43994219. The next prime is 43994257. The reversal of 43994247 is 74249934.

It is a cyclic number.

It is not a de Polignac number, because 43994247 - 2⁶ = 43994183 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 43994199 and 43994208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43994207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22029 + ... + 23942.

It is an arithmetic number, because the mean of its divisors is an integer number (4137480).

Almost surely, 2^43994247 is an apocalyptic number.

43994247 is a deficient number, since it is larger than the sum of its proper divisors (22205433).

43994247 is a wasteful number, since it uses less digits than its factorization.

43994247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46014.

The product of its digits is 217728, while the sum is 42.

The square root of 43994247 is about 6632.8159178436. The cubic root of 43994247 is about 353.0194464271.

It can be divided in two parts, 4399 and 4247, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 43994247 in words is "forty-three million, nine hundred ninety-four thousand, two hundred forty-seven".