3989889893 has 4 divisors (see below), whose sum is σ = 4352607168. Its totient is φ = 3627172620.

The previous prime is 3989889889. The next prime is 3989889913.

3989889893 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3989889893 - 2² = 3989889889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3989889893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989889863) 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, 181358621 + ... + 181358642.

It is an arithmetic number, because the mean of its divisors is an integer number (1088151792).

Almost surely, 2^3989889893 is an apocalyptic number.

It is an amenable number.

3989889893 is a deficient number, since it is larger than the sum of its proper divisors (362717275).

3989889893 is a wasteful number, since it uses less digits than its factorization.

3989889893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362717274.

The product of its digits is 241864704, while the sum is 74.

The square root of 3989889893 is about 63165.5752210015. The cubic root of 3989889893 is about 1586.0625240717.

The spelling of 3989889893 in words is "three billion, nine hundred eighty-nine million, eight hundred eighty-nine thousand, eight hundred ninety-three".