3686789 has 4 divisors (see below), whose sum is σ = 3707340. Its totient is φ = 3666240.

The previous prime is 3686747. The next prime is 3686797. The reversal of 3686789 is 9876863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9876863 = 683 ⋅14461.

It can be written as a sum of positive squares in 2 ways, for example, as 1020100 + 2666689 = 1010^2 + 1633^2 .

It is a cyclic number.

It is not a de Polignac number, because 3686789 - 2¹⁶ = 3621253 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 (3686729) 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, 10004 + ... + 10365.

It is an arithmetic number, because the mean of its divisors is an integer number (926835).

Almost surely, 2^3686789 is an apocalyptic number.

It is an amenable number.

3686789 is a deficient number, since it is larger than the sum of its proper divisors (20551).

3686789 is a wasteful number, since it uses less digits than its factorization.

3686789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20550.

The product of its digits is 435456, while the sum is 47.

The square root of 3686789 is about 1920.1012994110. The cubic root of 3686789 is about 154.4837350172.

The spelling of 3686789 in words is "three million, six hundred eighty-six thousand, seven hundred eighty-nine".