3879912989 has 4 divisors (see below), whose sum is σ = 3933062556. Its totient is φ = 3826763424.

The previous prime is 3879912947. The next prime is 3879912997. The reversal of 3879912989 is 9892199783.

3879912989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9892199783 = 113 ⋅87541591.

It can be written as a sum of positive squares in 2 ways, for example, as 1062108100 + 2817804889 = 32590^2 + 53083^2 .

It is a cyclic number.

It is not a de Polignac number, because 3879912989 - 2⁸ = 3879912733 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 (3879912089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26574674 + ... + 26574819.

It is an arithmetic number, because the mean of its divisors is an integer number (983265639).

Almost surely, 2^3879912989 is an apocalyptic number.

It is an amenable number.

3879912989 is a deficient number, since it is larger than the sum of its proper divisors (53149567).

3879912989 is an equidigital number, since it uses as much as digits as its factorization.

3879912989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53149566.

The product of its digits is 17635968, while the sum is 65.

The square root of 3879912989 is about 62288.9475669641. The cubic root of 3879912989 is about 1571.3538552539.

The spelling of 3879912989 in words is "three billion, eight hundred seventy-nine million, nine hundred twelve thousand, nine hundred eighty-nine".