8443009 has 4 divisors (see below), whose sum is σ = 8544816. Its totient is φ = 8341204.

The previous prime is 8442997. The next prime is 8443037. The reversal of 8443009 is 9003448.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8443009 - 2¹¹ = 8440961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8443069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50779 + ... + 50944.

It is an arithmetic number, because the mean of its divisors is an integer number (2136204).

Almost surely, 2^8443009 is an apocalyptic number.

It is an amenable number.

8443009 is a deficient number, since it is larger than the sum of its proper divisors (101807).

8443009 is a wasteful number, since it uses less digits than its factorization.

8443009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101806.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 8443009 is about 2905.6856333747. The cubic root of 8443009 is about 203.6256189433.

The spelling of 8443009 in words is "eight million, four hundred forty-three thousand, nine".