3987219410789 has 4 divisors (see below), whose sum is σ = 3987661021260. Its totient is φ = 3986777800320.

The previous prime is 3987219410753. The next prime is 3987219410821. The reversal of 3987219410789 is 9870149127893.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3874531634689 + 112687776100 = 1968383^2 + 335690^2 .

It is a cyclic number.

It is not a de Polignac number, because 3987219410789 - 2⁸ = 3987219410533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987219415789) 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 in 3 ways as a sum of consecutive naturals, for example, 220791692 + ... + 220809749.

It is an arithmetic number, because the mean of its divisors is an integer number (996915255315).

Almost surely, 2^{3987219410789} is an apocalyptic number.

It is an amenable number.

3987219410789 is a deficient number, since it is larger than the sum of its proper divisors (441610471).

3987219410789 is an equidigital number, since it uses as much as digits as its factorization.

3987219410789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441610470.

The product of its (nonzero) digits is 54867456, while the sum is 68.

The spelling of 3987219410789 in words is "three trillion, nine hundred eighty-seven billion, two hundred nineteen million, four hundred ten thousand, seven hundred eighty-nine".