3983661 has 40 divisors (see below), whose sum is σ = 6899904. Its totient is φ = 2263680.

The previous prime is 3983657. The next prime is 3983663. The reversal of 3983661 is 1663893.

It is a happy number.

It is not a de Polignac number, because 3983661 - 2² = 3983657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3983663) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 15016 + ... + 15278.

Almost surely, 2^3983661 is an apocalyptic number.

It is an amenable number.

3983661 is a deficient number, since it is larger than the sum of its proper divisors (2916243).

3983661 is a wasteful number, since it uses less digits than its factorization.

3983661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 294 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 3983661 is about 1995.9110701632. The cubic root of 3983661 is about 158.5236723559.

The spelling of 3983661 in words is "three million, nine hundred eighty-three thousand, six hundred sixty-one".