6944385213 has 12 divisors (see below), whose sum is σ = 10041450588. Its totient is φ = 4624664640.

The previous prime is 6944385197. The next prime is 6944385223. The reversal of 6944385213 is 3125834496.

6944385213 is a `hidden beast` number, since 6 + 94 + 4 + 38 + 521 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5479256484 + 1465128729 = 74022^2 + 38277^2 .

It is not a de Polignac number, because 6944385213 - 2⁴ = 6944385197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6944385223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 401520 + ... + 418457.

It is an arithmetic number, because the mean of its divisors is an integer number (836787549).

Almost surely, 2^6944385213 is an apocalyptic number.

It is an amenable number.

6944385213 is a deficient number, since it is larger than the sum of its proper divisors (3097065375).

6944385213 is a wasteful number, since it uses less digits than its factorization.

6944385213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820924 (or 820921 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 6944385213 is about 83332.9779439089. The cubic root of 6944385213 is about 1907.8516466606.

The spelling of 6944385213 in words is "six billion, nine hundred forty-four million, three hundred eighty-five thousand, two hundred thirteen".