8440609 has 4 divisors (see below), whose sum is σ = 8807616. Its totient is φ = 8073604.

The previous prime is 8440603. The next prime is 8440613. The reversal of 8440609 is 9060448.

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 8440609 - 2⁵ = 8440577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8440603) 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, 183469 + ... + 183514.

It is an arithmetic number, because the mean of its divisors is an integer number (2201904).

Almost surely, 2^8440609 is an apocalyptic number.

It is an amenable number.

8440609 is a deficient number, since it is larger than the sum of its proper divisors (367007).

8440609 is a wasteful number, since it uses less digits than its factorization.

8440609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367006.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 8440609 is about 2905.2726205986. The cubic root of 8440609 is about 203.6063229870.

The spelling of 8440609 in words is "eight million, four hundred forty thousand, six hundred nine".