3981494443 has 2 divisors, whose sum is σ = 3981494444. Its totient is φ = 3981494442.

The previous prime is 3981494417. The next prime is 3981494453. The reversal of 3981494443 is 3444941893.

3981494443 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 is a cyclic number.

It is not a de Polignac number, because 3981494443 - 2¹³ = 3981486251 is a prime.

It is not a weakly prime, because it can be changed into another prime (3981494453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1990747221 + 1990747222.

It is an arithmetic number, because the mean of its divisors is an integer number (1990747222).

Almost surely, 2^3981494443 is an apocalyptic number.

3981494443 is a deficient number, since it is larger than the sum of its proper divisors (1).

3981494443 is an equidigital number, since it uses as much as digits as its factorization.

3981494443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 49.

The square root of 3981494443 is about 63099.0843277460. The cubic root of 3981494443 is about 1584.9492887476.

The spelling of 3981494443 in words is "three billion, nine hundred eighty-one million, four hundred ninety-four thousand, four hundred forty-three".