899644443 has 8 divisors (see below), whose sum is σ = 1217429568. Its totient is φ = 590811144.

The previous prime is 899644423. The next prime is 899644469. The reversal of 899644443 is 344446998.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-899644443 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (899644423) 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 7 ways as a sum of consecutive naturals, for example, 2237721 + ... + 2238122.

It is an arithmetic number, because the mean of its divisors is an integer number (152178696).

Almost surely, 2^899644443 is an apocalyptic number.

899644443 is a deficient number, since it is larger than the sum of its proper divisors (317785125).

899644443 is a wasteful number, since it uses less digits than its factorization.

899644443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4475913.

The product of its digits is 2985984, while the sum is 51.

The square root of 899644443 is about 29994.0734646030. The cubic root of 899644443 is about 965.3622247072.

The spelling of 899644443 in words is "eight hundred ninety-nine million, six hundred forty-four thousand, four hundred forty-three".