9009789 has 8 divisors (see below), whose sum is σ = 12032640. Its totient is φ = 5996736.

The previous prime is 9009773. The next prime is 9009811. The reversal of 9009789 is 9879009.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9009789 - 2⁴ = 9009773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9009789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9009739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69 + ... + 4245.

It is an arithmetic number, because the mean of its divisors is an integer number (1504080).

Almost surely, 2^9009789 is an apocalyptic number.

It is an amenable number.

9009789 is a deficient number, since it is larger than the sum of its proper divisors (3022851).

9009789 is a wasteful number, since it uses less digits than its factorization.

9009789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4899.

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 9009789 is about 3001.6310566091. The cubic root of 9009789 is about 208.0837695743.

The spelling of 9009789 in words is "nine million, nine thousand, seven hundred eighty-nine".