3988303428521 has 2 divisors, whose sum is σ = 3988303428522. Its totient is φ = 3988303428520.

The previous prime is 3988303428509. The next prime is 3988303428563. The reversal of 3988303428521 is 1258243038893.

3988303428521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3987190272025 + 1113156496 = 1996795^2 + 33364^2 .

It is an emirp because it is prime and its reverse (1258243038893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3988303428521 - 2³⁸ = 3713425521577 is a prime.

It is not a weakly prime, because it can be changed into another prime (3988303421521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994151714260 + 1994151714261.

It is an arithmetic number, because the mean of its divisors is an integer number (1994151714261).

Almost surely, 2^{3988303428521} is an apocalyptic number.

It is an amenable number.

3988303428521 is a deficient number, since it is larger than the sum of its proper divisors (1).

3988303428521 is an equidigital number, since it uses as much as digits as its factorization.

3988303428521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9953280, while the sum is 56.

The spelling of 3988303428521 in words is "three trillion, nine hundred eighty-eight billion, three hundred three million, four hundred twenty-eight thousand, five hundred twenty-one".