9000639 has 10 divisors (see below), whose sum is σ = 13445520. Its totient is φ = 6000372.

The previous prime is 9000637. The next prime is 9000683. The reversal of 9000639 is 9360009.

9000639 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9000639 - 2¹ = 9000637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9000637) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 55479 + ... + 55640.

It is an arithmetic number, because the mean of its divisors is an integer number (1344552).

Almost surely, 2^9000639 is an apocalyptic number.

9000639 is a deficient number, since it is larger than the sum of its proper divisors (4444881).

9000639 is a wasteful number, since it uses less digits than its factorization.

9000639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111131 (or 111122 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 9000639 is about 3000.1064981097. The cubic root of 9000639 is about 208.0133050537.

The spelling of 9000639 in words is "nine million, six hundred thirty-nine", and thus it is an aban number.