6976872209 has 2 divisors, whose sum is σ = 6976872210. Its totient is φ = 6976872208.

The previous prime is 6976872173. The next prime is 6976872223. The reversal of 6976872209 is 9022786796.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4231112209 + 2745760000 = 65047^2 + 52400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6976872209 is a prime.

It is not a weakly prime, because it can be changed into another prime (6976812209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3488436104 + 3488436105.

It is an arithmetic number, because the mean of its divisors is an integer number (3488436105).

Almost surely, 2^6976872209 is an apocalyptic number.

It is an amenable number.

6976872209 is a deficient number, since it is larger than the sum of its proper divisors (1).

6976872209 is an equidigital number, since it uses as much as digits as its factorization.

6976872209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The square root of 6976872209 is about 83527.6733125016. The cubic root of 6976872209 is about 1910.8221024469.

The spelling of 6976872209 in words is "six billion, nine hundred seventy-six million, eight hundred seventy-two thousand, two hundred nine".