3687381 has 6 divisors (see below), whose sum is σ = 5326230. Its totient is φ = 2458248.

The previous prime is 3687373. The next prime is 3687391. The reversal of 3687381 is 1837863.

3687381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3006756 + 680625 = 1734^2 + 825^2 .

It is not a de Polignac number, because 3687381 - 2³ = 3687373 is a prime.

It is a super-2 number, since 2×3687381² = 27193557278322, which contains 22 as substring.

3687381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3687301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 204846 + ... + 204863.

It is an arithmetic number, because the mean of its divisors is an integer number (887705).

Almost surely, 2^3687381 is an apocalyptic number.

It is an amenable number.

3687381 is a deficient number, since it is larger than the sum of its proper divisors (1638849).

3687381 is a wasteful number, since it uses less digits than its factorization.

3687381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409715 (or 409712 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 3687381 is about 1920.2554517564. The cubic root of 3687381 is about 154.4920032308.

The spelling of 3687381 in words is "three million, six hundred eighty-seven thousand, three hundred eighty-one".