8644423 has 4 divisors (see below), whose sum is σ = 8725320. Its totient is φ = 8563528.

The previous prime is 8644397. The next prime is 8644439. The reversal of 8644423 is 3244468.

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 8644423 - 2²¹ = 6547271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8644453) 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 3 ways as a sum of consecutive naturals, for example, 40288 + ... + 40501.

It is an arithmetic number, because the mean of its divisors is an integer number (2181330).

Almost surely, 2^8644423 is an apocalyptic number.

8644423 is a deficient number, since it is larger than the sum of its proper divisors (80897).

8644423 is a wasteful number, since it uses less digits than its factorization.

8644423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80896.

The product of its digits is 18432, while the sum is 31.

The square root of 8644423 is about 2940.1399626548. The cubic root of 8644423 is about 205.2321225521.

The spelling of 8644423 in words is "eight million, six hundred forty-four thousand, four hundred twenty-three".