8636489 has 4 divisors (see below), whose sum is σ = 8649924. Its totient is φ = 8623056.

The previous prime is 8636473. The next prime is 8636491. The reversal of 8636489 is 9846368.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7382089 + 1254400 = 2717^2 + 1120^2 .

It is a cyclic number.

It is not a de Polignac number, because 8636489 - 2⁴ = 8636473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8636449) 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, 5702 + ... + 7055.

It is an arithmetic number, because the mean of its divisors is an integer number (2162481).

Almost surely, 2^8636489 is an apocalyptic number.

It is an amenable number.

8636489 is a deficient number, since it is larger than the sum of its proper divisors (13435).

8636489 is a wasteful number, since it uses less digits than its factorization.

8636489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13434.

The product of its digits is 248832, while the sum is 44.

The square root of 8636489 is about 2938.7903974254. The cubic root of 8636489 is about 205.1693148097.

The spelling of 8636489 in words is "eight million, six hundred thirty-six thousand, four hundred eighty-nine".