3686791 has 4 divisors (see below), whose sum is σ = 3786472. Its totient is φ = 3587112.

The previous prime is 3686747. The next prime is 3686797. The reversal of 3686791 is 1976863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1976863 = 7 ⋅282409.

It is a cyclic number.

It is not a de Polignac number, because 3686791 - 2⁷ = 3686663 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 (3686797) 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, 49785 + ... + 49858.

It is an arithmetic number, because the mean of its divisors is an integer number (946618).

Almost surely, 2^3686791 is an apocalyptic number.

3686791 is a deficient number, since it is larger than the sum of its proper divisors (99681).

3686791 is an equidigital number, since it uses as much as digits as its factorization.

3686791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99680.

The product of its digits is 54432, while the sum is 40.

The square root of 3686791 is about 1920.1018202168. The cubic root of 3686791 is about 154.4837629519.

The spelling of 3686791 in words is "three million, six hundred eighty-six thousand, seven hundred ninety-one".