8990509 has 4 divisors (see below), whose sum is σ = 9807840. Its totient is φ = 8173180.

The previous prime is 8990497. The next prime is 8990533. The reversal of 8990509 is 9050998.

8990509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 8990509 - 2¹³ = 8982317 is a prime.

It is a Duffinian number.

8990509 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8990209) 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, 408649 + ... + 408670.

It is an arithmetic number, because the mean of its divisors is an integer number (2451960).

Almost surely, 2^8990509 is an apocalyptic number.

It is an amenable number.

8990509 is a deficient number, since it is larger than the sum of its proper divisors (817331).

8990509 is a wasteful number, since it uses less digits than its factorization.

8990509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817330.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 8990509 is about 2998.4177494138. The cubic root of 8990509 is about 207.9352377891.

The spelling of 8990509 in words is "eight million, nine hundred ninety thousand, five hundred nine".