3681887 has 4 divisors (see below), whose sum is σ = 4016616. Its totient is φ = 3347160.

The previous prime is 3681871. The next prime is 3681889. The reversal of 3681887 is 7881863.

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 3681887 - 2⁴ = 3681871 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 (3681889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167348 + ... + 167369.

It is an arithmetic number, because the mean of its divisors is an integer number (1004154).

Almost surely, 2^3681887 is an apocalyptic number.

3681887 is a deficient number, since it is larger than the sum of its proper divisors (334729).

3681887 is a wasteful number, since it uses less digits than its factorization.

3681887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334728.

The product of its digits is 64512, while the sum is 41.

The square root of 3681887 is about 1918.8243796658. The cubic root of 3681887 is about 154.4152368249.

The spelling of 3681887 in words is "three million, six hundred eighty-one thousand, eight hundred eighty-seven".