6696974309 has 2 divisors, whose sum is σ = 6696974310. Its totient is φ = 6696974308.

The previous prime is 6696974303. The next prime is 6696974311. The reversal of 6696974309 is 9034796966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6687641284 + 9333025 = 81778^2 + 3055^2 .

It is a cyclic number.

It is not a de Polignac number, because 6696974309 - 2⁴ = 6696974293 is a prime.

It is a Sophie Germain prime.

Together with 6696974311, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6696974303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3348487154 + 3348487155.

It is an arithmetic number, because the mean of its divisors is an integer number (3348487155).

Almost surely, 2^6696974309 is an apocalyptic number.

It is an amenable number.

6696974309 is a deficient number, since it is larger than the sum of its proper divisors (1).

6696974309 is an equidigital number, since it uses as much as digits as its factorization.

6696974309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13226976, while the sum is 59.

The square root of 6696974309 is about 81835.0432822028. The cubic root of 6696974309 is about 1884.9198050252.

The spelling of 6696974309 in words is "six billion, six hundred ninety-six million, nine hundred seventy-four thousand, three hundred nine".