8916509 has 4 divisors (see below), whose sum is σ = 10190304. Its totient is φ = 7642716.

The previous prime is 8916503. The next prime is 8916521. The reversal of 8916509 is 9056198.

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 8916509 - 2¹⁶ = 8850973 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 (8916503) 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, 636887 + ... + 636900.

It is an arithmetic number, because the mean of its divisors is an integer number (2547576).

Almost surely, 2^8916509 is an apocalyptic number.

It is an amenable number.

8916509 is a deficient number, since it is larger than the sum of its proper divisors (1273795).

8916509 is a wasteful number, since it uses less digits than its factorization.

8916509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1273794.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 8916509 is about 2986.0524107926. The cubic root of 8916509 is about 207.3631671542.

The spelling of 8916509 in words is "eight million, nine hundred sixteen thousand, five hundred nine".