6979705209 has 12 divisors (see below), whose sum is σ = 10096785556. Its totient is φ = 4646218752.

The previous prime is 6979705207. The next prime is 6979705219. The reversal of 6979705209 is 9025079796.

It can be written as a sum of positive squares in 2 ways, for example, as 1526621184 + 5453084025 = 39072^2 + 73845^2 .

It is not a de Polignac number, because 6979705209 - 2¹ = 6979705207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6979705207) 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, 570112 + ... + 582225.

Almost surely, 2^6979705209 is an apocalyptic number.

It is an amenable number.

6979705209 is a deficient number, since it is larger than the sum of its proper divisors (3117080347).

6979705209 is a wasteful number, since it uses less digits than its factorization.

6979705209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153016 (or 1153013 counting only the distinct ones).

The product of its (nonzero) digits is 2143260, while the sum is 54.

The square root of 6979705209 is about 83544.6300428699. The cubic root of 6979705209 is about 1911.0807009665.

The spelling of 6979705209 in words is "six billion, nine hundred seventy-nine million, seven hundred five thousand, two hundred nine".