3686909 has 4 divisors (see below), whose sum is σ = 3903804. Its totient is φ = 3470016.

The previous prime is 3686867. The next prime is 3686927. The reversal of 3686909 is 9096863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9096863 = 751 ⋅12113.

It can be written as a sum of positive squares in 2 ways, for example, as 3161284 + 525625 = 1778^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 3686909 - 2¹² = 3682813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3686929) 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, 108422 + ... + 108455.

It is an arithmetic number, because the mean of its divisors is an integer number (975951).

Almost surely, 2^3686909 is an apocalyptic number.

It is an amenable number.

3686909 is a deficient number, since it is larger than the sum of its proper divisors (216895).

3686909 is a wasteful number, since it uses less digits than its factorization.

3686909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216894.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 3686909 is about 1920.1325475081. The cubic root of 3686909 is about 154.4854110780.

The spelling of 3686909 in words is "three million, six hundred eighty-six thousand, nine hundred nine".