8979509 has 16 divisors (see below), whose sum is σ = 11262336. Its totient is φ = 6955200.

The previous prime is 8979497. The next prime is 8979569. The reversal of 8979509 is 9059798.

It is not a de Polignac number, because 8979509 - 2²⁰ = 7930933 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 (8979569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21119 + ... + 21539.

It is an arithmetic number, because the mean of its divisors is an integer number (703896).

Almost surely, 2^8979509 is an apocalyptic number.

It is an amenable number.

8979509 is a deficient number, since it is larger than the sum of its proper divisors (2282827).

8979509 is a wasteful number, since it uses less digits than its factorization.

8979509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716.

The product of its (nonzero) digits is 204120, while the sum is 47.

The square root of 8979509 is about 2996.5828872234. The cubic root of 8979509 is about 207.8503993930.

The spelling of 8979509 in words is "eight million, nine hundred seventy-nine thousand, five hundred nine".