8718609 has 16 divisors (see below), whose sum is σ = 12083904. Its totient is φ = 5587200.

The previous prime is 8718601. The next prime is 8718649. The reversal of 8718609 is 9068178.

It is not a de Polignac number, because 8718609 - 2³ = 8718601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8718601) 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 15 ways as a sum of consecutive naturals, for example, 8494 + ... + 9464.

It is an arithmetic number, because the mean of its divisors is an integer number (755244).

Almost surely, 2^8718609 is an apocalyptic number.

It is an amenable number.

8718609 is a deficient number, since it is larger than the sum of its proper divisors (3365295).

8718609 is a wasteful number, since it uses less digits than its factorization.

8718609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 8718609 is about 2952.7290766340. The cubic root of 8718609 is about 205.8175482585.

The spelling of 8718609 in words is "eight million, seven hundred eighteen thousand, six hundred nine".