3138161891 has 8 divisors (see below), whose sum is σ = 3264315600. Its totient is φ = 3013204320.

The previous prime is 3138161839. The next prime is 3138161909. The reversal of 3138161891 is 1981618313.

3138161891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3138161891 - 2¹⁰ = 3138160867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3138160891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293681 + ... + 304178.

It is an arithmetic number, because the mean of its divisors is an integer number (408039450).

Almost surely, 2^3138161891 is an apocalyptic number.

3138161891 is a deficient number, since it is larger than the sum of its proper divisors (126153709).

3138161891 is a wasteful number, since it uses less digits than its factorization.

3138161891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598069.

The product of its digits is 31104, while the sum is 41.

The square root of 3138161891 is about 56019.2992726614. The cubic root of 3138161891 is about 1464.0585596419.

The spelling of 3138161891 in words is "three billion, one hundred thirty-eight million, one hundred sixty-one thousand, eight hundred ninety-one".