3989665123811 has 2 divisors, whose sum is σ = 3989665123812. Its totient is φ = 3989665123810.

The previous prime is 3989665123793. The next prime is 3989665123823. The reversal of 3989665123811 is 1183215669893.

3989665123811 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 3989665123811 - 2⁶ = 3989665123747 is a prime.

It is not a weakly prime, because it can be changed into another prime (3989665123211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994832561905 + 1994832561906.

It is an arithmetic number, because the mean of its divisors is an integer number (1994832561906).

Almost surely, 2^{3989665123811} is an apocalyptic number.

3989665123811 is a deficient number, since it is larger than the sum of its proper divisors (1).

3989665123811 is an equidigital number, since it uses as much as digits as its factorization.

3989665123811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16796160, while the sum is 62.

The spelling of 3989665123811 in words is "three trillion, nine hundred eighty-nine billion, six hundred sixty-five million, one hundred twenty-three thousand, eight hundred eleven".