6939743213 has 8 divisors (see below), whose sum is σ = 7913191608. Its totient is φ = 6029097984.

The previous prime is 6939743197. The next prime is 6939743233. The reversal of 6939743213 is 3123479396.

6939743213 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 378419209 + 6561324004 = 19453^2 + 81002^2 .

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

It is not a de Polignac number, because 6939743213 - 2⁴ = 6939743197 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 (6939743233) 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, 15700556 + ... + 15700997.

It is an arithmetic number, because the mean of its divisors is an integer number (989148951).

Almost surely, 2^6939743213 is an apocalyptic number.

It is an amenable number.

6939743213 is a deficient number, since it is larger than the sum of its proper divisors (973448395).

6939743213 is a wasteful number, since it uses less digits than its factorization.

6939743213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31401583.

The product of its digits is 734832, while the sum is 47.

The square root of 6939743213 is about 83305.1211691094. The cubic root of 6939743213 is about 1907.4264484063.

The spelling of 6939743213 in words is "six billion, nine hundred thirty-nine million, seven hundred forty-three thousand, two hundred thirteen".