3159389921 has 4 divisors (see below), whose sum is σ = 3159595200. Its totient is φ = 3159184644.

The previous prime is 3159389899. The next prime is 3159389927. The reversal of 3159389921 is 1299839513.

It is a happy number.

3159389921 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 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 3159389921 - 2²⁶ = 3092281057 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 3159389921.

It is not an unprimeable number, because it can be changed into a prime (3159389927) 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, 77501 + ... + 111018.

It is an arithmetic number, because the mean of its divisors is an integer number (789898800).

Almost surely, 2^3159389921 is an apocalyptic number.

It is an amenable number.

3159389921 is a deficient number, since it is larger than the sum of its proper divisors (205279).

3159389921 is a wasteful number, since it uses less digits than its factorization.

3159389921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205278.

The product of its digits is 524880, while the sum is 50.

The square root of 3159389921 is about 56208.4506191018. The cubic root of 3159389921 is about 1467.3523416234.

The spelling of 3159389921 in words is "three billion, one hundred fifty-nine million, three hundred eighty-nine thousand, nine hundred twenty-one".