8685389 has 4 divisors (see below), whose sum is σ = 8748924. Its totient is φ = 8621856.

The previous prime is 8685379. The next prime is 8685407. The reversal of 8685389 is 9835868.

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 4169764 + 4515625 = 2042^2 + 2125^2 .

It is a cyclic number.

It is not a de Polignac number, because 8685389 - 2⁴ = 8685373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8685319) 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, 31562 + ... + 31835.

It is an arithmetic number, because the mean of its divisors is an integer number (2187231).

Almost surely, 2^8685389 is an apocalyptic number.

It is an amenable number.

8685389 is a deficient number, since it is larger than the sum of its proper divisors (63535).

8685389 is a wasteful number, since it uses less digits than its factorization.

8685389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63534.

The product of its digits is 414720, while the sum is 47.

The square root of 8685389 is about 2947.0984035149. The cubic root of 8685389 is about 205.5558107402. Note that the first 3 decimals are identical.

The spelling of 8685389 in words is "eight million, six hundred eighty-five thousand, three hundred eighty-nine".