3183981 has 16 divisors (see below), whose sum is σ = 4536000. Its totient is φ = 1979648.

The previous prime is 3183977. The next prime is 3183989. The reversal of 3183981 is 1893813.

3183981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 3183981 - 2² = 3183977 is a prime.

It is a super-2 number, since 2×3183981² = 20275470016722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3183989) 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 15 ways as a sum of consecutive naturals, for example, 7390 + ... + 7808.

It is an arithmetic number, because the mean of its divisors is an integer number (283500).

Almost surely, 2^3183981 is an apocalyptic number.

It is an amenable number.

3183981 is a deficient number, since it is larger than the sum of its proper divisors (1352019).

3183981 is a wasteful number, since it uses less digits than its factorization.

3183981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588.

The product of its digits is 5184, while the sum is 33.

The square root of 3183981 is about 1784.3713178596. The cubic root of 3183981 is about 147.1149547387.

The spelling of 3183981 in words is "three million, one hundred eighty-three thousand, nine hundred eighty-one".