3687685 has 4 divisors (see below), whose sum is σ = 4425228. Its totient is φ = 2950144.

The previous prime is 3687683. The next prime is 3687703. The reversal of 3687685 is 5867863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5867863 = 487 ⋅12049.

It can be written as a sum of positive squares in 2 ways, for example, as 649636 + 3038049 = 806^2 + 1743^2 .

It is a cyclic number.

It is not a de Polignac number, because 3687685 - 2¹ = 3687683 is a prime.

It is a Duffinian number.

3687685 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3687683) 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, 368764 + ... + 368773.

It is an arithmetic number, because the mean of its divisors is an integer number (1106307).

Almost surely, 2^3687685 is an apocalyptic number.

It is an amenable number.

3687685 is a deficient number, since it is larger than the sum of its proper divisors (737543).

3687685 is an equidigital number, since it uses as much as digits as its factorization.

3687685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737542.

The product of its digits is 241920, while the sum is 43.

The square root of 3687685 is about 1920.3346062601. The cubic root of 3687685 is about 154.4962487263.

The spelling of 3687685 in words is "three million, six hundred eighty-seven thousand, six hundred eighty-five".