3984926381489 has 2 divisors, whose sum is σ = 3984926381490. Its totient is φ = 3984926381488.

The previous prime is 3984926381461. The next prime is 3984926381497. The reversal of 3984926381489 is 9841836294893.

3984926381489 is digitally balanced in base 3, 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., 3657637125025 + 327289256464 = 1912495^2 + 572092^2 .

It is a cyclic number.

It is not a de Polignac number, because 3984926381489 - 2²⁸ = 3984657946033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3984926383489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1992463190744 + 1992463190745.

It is an arithmetic number, because the mean of its divisors is an integer number (1992463190745).

Almost surely, 2^{3984926381489} is an apocalyptic number.

It is an amenable number.

3984926381489 is a deficient number, since it is larger than the sum of its proper divisors (1).

3984926381489 is an equidigital number, since it uses as much as digits as its factorization.

3984926381489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 644972544, while the sum is 74.

The spelling of 3984926381489 in words is "three trillion, nine hundred eighty-four billion, nine hundred twenty-six million, three hundred eighty-one thousand, four hundred eighty-nine".