3986681 has 8 divisors (see below), whose sum is σ = 4099584. Its totient is φ = 3875040.

The previous prime is 3986677. The next prime is 3986699. The reversal of 3986681 is 1866893.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3986681 - 2² = 3986677 is a prime.

It is a super-2 number, since 2×3986681² = 31787250791522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3986611) 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, 12581 + ... + 12893.

It is an arithmetic number, because the mean of its divisors is an integer number (512448).

Almost surely, 2^3986681 is an apocalyptic number.

It is an amenable number.

3986681 is a deficient number, since it is larger than the sum of its proper divisors (112903).

3986681 is a wasteful number, since it uses less digits than its factorization.

3986681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631.

The product of its digits is 62208, while the sum is 41.

The square root of 3986681 is about 1996.6674735669. The cubic root of 3986681 is about 158.5637209915.

The spelling of 3986681 in words is "three million, nine hundred eighty-six thousand, six hundred eighty-one".