3686687 has 4 divisors (see below), whose sum is σ = 3694440. Its totient is φ = 3678936.

The previous prime is 3686677. The next prime is 3686701. The reversal of 3686687 is 7866863.

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

It is a cyclic number.

It is not a de Polignac number, because 3686687 - 2⁶ = 3686623 is a prime.

It is a super-2 number, since 2×3686687² = 27183322071938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3686677) 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, 3113 + ... + 4130.

It is an arithmetic number, because the mean of its divisors is an integer number (923610).

Almost surely, 2^3686687 is an apocalyptic number.

3686687 is a deficient number, since it is larger than the sum of its proper divisors (7753).

3686687 is an equidigital number, since it uses as much as digits as its factorization.

3686687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7752.

The product of its digits is 290304, while the sum is 44.

The square root of 3686687 is about 1920.0747381287. The cubic root of 3686687 is about 154.4823103370.

The spelling of 3686687 in words is "three million, six hundred eighty-six thousand, six hundred eighty-seven".