3686691 has 8 divisors (see below), whose sum is σ = 5030080. Its totient is φ = 2400552.

The previous prime is 3686677. The next prime is 3686701. The reversal of 3686691 is 1966863.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3686691 - 2¹¹ = 3684643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3686621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14161 + ... + 14418.

It is an arithmetic number, because the mean of its divisors is an integer number (628760).

Almost surely, 2^3686691 is an apocalyptic number.

3686691 is a deficient number, since it is larger than the sum of its proper divisors (1343389).

3686691 is a wasteful number, since it uses less digits than its factorization.

3686691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28625.

The product of its digits is 46656, while the sum is 39.

The square root of 3686691 is about 1920.0757797545. The cubic root of 3686691 is about 154.4823662073.

The spelling of 3686691 in words is "three million, six hundred eighty-six thousand, six hundred ninety-one".