3981683619593 has 2 divisors, whose sum is σ = 3981683619594. Its totient is φ = 3981683619592.

The previous prime is 3981683619587. The next prime is 3981683619701. The reversal of 3981683619593 is 3959163861893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2504360055289 + 1477323564304 = 1582517^2 + 1215452^2 .

It is an emirp because it is prime and its reverse (3959163861893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3981683619593 - 2⁴ = 3981683619577 is a prime.

It is not a weakly prime, because it can be changed into another prime (3981683615593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1990841809796 + 1990841809797.

It is an arithmetic number, because the mean of its divisors is an integer number (1990841809797).

Almost surely, 2^{3981683619593} is an apocalyptic number.

It is an amenable number.

3981683619593 is a deficient number, since it is larger than the sum of its proper divisors (1).

3981683619593 is an equidigital number, since it uses as much as digits as its factorization.

3981683619593 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226748160, while the sum is 71.

The spelling of 3981683619593 in words is "three trillion, nine hundred eighty-one billion, six hundred eighty-three million, six hundred nineteen thousand, five hundred ninety-three".