2689887709 has 2 divisors, whose sum is σ = 2689887710. Its totient is φ = 2689887708.

The previous prime is 2689887689. The next prime is 2689887727. The reversal of 2689887709 is 9077889862.

2689887709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2663076025 + 26811684 = 51605^2 + 5178^2 .

It is a cyclic number.

It is not a de Polignac number, because 2689887709 - 2⁵ = 2689887677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2689887769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344943854 + 1344943855.

It is an arithmetic number, because the mean of its divisors is an integer number (1344943855).

Almost surely, 2^2689887709 is an apocalyptic number.

It is an amenable number.

2689887709 is a deficient number, since it is larger than the sum of its proper divisors (1).

2689887709 is an equidigital number, since it uses as much as digits as its factorization.

2689887709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24385536, while the sum is 64.

The square root of 2689887709 is about 51864.1273810714. The cubic root of 2689887709 is about 1390.7360642711.

The spelling of 2689887709 in words is "two billion, six hundred eighty-nine million, eight hundred eighty-seven thousand, seven hundred nine".