3813839389 has 4 divisors (see below), whose sum is σ = 3817620220. Its totient is φ = 3810058560.

The previous prime is 3813839333. The next prime is 3813839399. The reversal of 3813839389 is 9839383183.

It is a happy number.

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 2006144100 + 1807695289 = 44790^2 + 42517^2 .

It is a cyclic number.

It is not a de Polignac number, because 3813839389 - 2⁷ = 3813839261 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 (3813839399) 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, 1888902 + ... + 1890919.

It is an arithmetic number, because the mean of its divisors is an integer number (954405055).

Almost surely, 2^3813839389 is an apocalyptic number.

It is an amenable number.

3813839389 is a deficient number, since it is larger than the sum of its proper divisors (3780831).

3813839389 is a wasteful number, since it uses less digits than its factorization.

3813839389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3780830.

The product of its digits is 3359232, while the sum is 55.

The square root of 3813839389 is about 61756.2902788048. The cubic root of 3813839389 is about 1562.3828624634.

The spelling of 3813839389 in words is "three billion, eight hundred thirteen million, eight hundred thirty-nine thousand, three hundred eighty-nine".