6931446813 has 6 divisors (see below), whose sum is σ = 10012089854. Its totient is φ = 4620964536.

The previous prime is 6931446811. The next prime is 6931446833. The reversal of 6931446813 is 3186441396.

It can be written as a sum of positive squares in only one way, i.e., 5904692964 + 1026753849 = 76842^2 + 32043^2 .

It is not a de Polignac number, because 6931446813 - 2¹ = 6931446811 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 (6931446811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 385080370 + ... + 385080387.

Almost surely, 2^6931446813 is an apocalyptic number.

It is an amenable number.

6931446813 is a deficient number, since it is larger than the sum of its proper divisors (3080643041).

6931446813 is a wasteful number, since it uses less digits than its factorization.

6931446813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770160763 (or 770160760 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 6931446813 is about 83255.3110197782. The cubic root of 6931446813 is about 1906.6660416393. Note that the first 3 decimals are identical.

The spelling of 6931446813 in words is "six billion, nine hundred thirty-one million, four hundred forty-six thousand, eight hundred thirteen".