2680609709 has 2 divisors, whose sum is σ = 2680609710. Its totient is φ = 2680609708.

The previous prime is 2680609663. The next prime is 2680609721. The reversal of 2680609709 is 9079060862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2339173225 + 341436484 = 48365^2 + 18478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2680609709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2680609739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1340304854 + 1340304855.

It is an arithmetic number, because the mean of its divisors is an integer number (1340304855).

Almost surely, 2^2680609709 is an apocalyptic number.

It is an amenable number.

2680609709 is a deficient number, since it is larger than the sum of its proper divisors (1).

2680609709 is an equidigital number, since it uses as much as digits as its factorization.

2680609709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 2680609709 is about 51774.6048657061. The cubic root of 2680609709 is about 1389.1352399426.

The spelling of 2680609709 in words is "two billion, six hundred eighty million, six hundred nine thousand, seven hundred nine".