3691685 has 8 divisors (see below), whose sum is σ = 4440696. Its totient is φ = 2946240.

The previous prime is 3691673. The next prime is 3691687. The reversal of 3691685 is 5861963.

It can be written as a sum of positive squares in 4 ways, for example, as 134689 + 3556996 = 367^2 + 1886^2 .

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

It is not a de Polignac number, because 3691685 - 2⁶ = 3691621 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 (3691687) 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, 2747 + ... + 3863.

It is an arithmetic number, because the mean of its divisors is an integer number (555087).

Almost surely, 2^3691685 is an apocalyptic number.

It is an amenable number.

3691685 is a deficient number, since it is larger than the sum of its proper divisors (749011).

3691685 is a wasteful number, since it uses less digits than its factorization.

3691685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1783.

The product of its digits is 38880, while the sum is 38.

The square root of 3691685 is about 1921.3758091534. The cubic root of 3691685 is about 154.5520887893.

The spelling of 3691685 in words is "three million, six hundred ninety-one thousand, six hundred eighty-five".