3983681 has 4 divisors (see below), whose sum is σ = 4290132. Its totient is φ = 3677232.

The previous prime is 3983663. The next prime is 3983689. The reversal of 3983681 is 1863893.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 801025 + 3182656 = 895^2 + 1784^2 .

It is not a de Polignac number, because 3983681 - 2¹⁴ = 3967297 is a prime.

It is a super-2 number, since 2×3983681² = 31739428619522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (3983689) 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, 153206 + ... + 153231.

It is an arithmetic number, because the mean of its divisors is an integer number (1072533).

Almost surely, 2^3983681 is an apocalyptic number.

It is an amenable number.

3983681 is a deficient number, since it is larger than the sum of its proper divisors (306451).

3983681 is a wasteful number, since it uses less digits than its factorization.

3983681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306450.

The product of its digits is 31104, while the sum is 38.

The square root of 3983681 is about 1995.9160804002. The cubic root of 3983681 is about 158.5239376452.

It can be divided in two parts, 3983 and 681, that added together give a palindrome (4664).

The spelling of 3983681 in words is "three million, nine hundred eighty-three thousand, six hundred eighty-one".