8518909 has 4 divisors (see below), whose sum is σ = 9735904. Its totient is φ = 7301916.

The previous prime is 8518907. The next prime is 8518931. The reversal of 8518909 is 9098158.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9098158 = 2 ⋅4549079.

It is a cyclic number.

It is not a de Polignac number, because 8518909 - 2¹ = 8518907 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 (8518907) 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, 608487 + ... + 608500.

It is an arithmetic number, because the mean of its divisors is an integer number (2433976).

Almost surely, 2^8518909 is an apocalyptic number.

It is an amenable number.

8518909 is a deficient number, since it is larger than the sum of its proper divisors (1216995).

8518909 is a wasteful number, since it uses less digits than its factorization.

8518909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216994.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 8518909 is about 2918.7170126616. The cubic root of 8518909 is about 204.2339763815.

The spelling of 8518909 in words is "eight million, five hundred eighteen thousand, nine hundred nine".