3803981 has 2 divisors, whose sum is σ = 3803982. Its totient is φ = 3803980.

The previous prime is 3803977. The next prime is 3803983. The reversal of 3803981 is 1893083.

3803981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3455881 + 348100 = 1859^2 + 590^2 .

It is an emirp because it is prime and its reverse (1893083) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3803981 - 2² = 3803977 is a prime.

It is a super-2 number, since 2×3803981² = 28940542896722, which contains 22 as substring.

Together with 3803983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3803983) 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 as a sum of consecutive naturals, namely, 1901990 + 1901991.

It is an arithmetic number, because the mean of its divisors is an integer number (1901991).

Almost surely, 2^3803981 is an apocalyptic number.

It is an amenable number.

3803981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3803981 is an equidigital number, since it uses as much as digits as its factorization.

3803981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 3803981 is about 1950.3797066213. The cubic root of 3803981 is about 156.1035500316.

The spelling of 3803981 in words is "three million, eight hundred three thousand, nine hundred eighty-one".