2688817897 has 2 divisors, whose sum is σ = 2688817898. Its totient is φ = 2688817896.

The previous prime is 2688817847. The next prime is 2688817909. The reversal of 2688817897 is 7987188862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1913975001 + 774842896 = 43749^2 + 27836^2 .

It is a cyclic number.

It is not a de Polignac number, because 2688817897 - 2¹¹ = 2688815849 is a prime.

It is not a weakly prime, because it can be changed into another prime (2688817847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344408948 + 1344408949.

It is an arithmetic number, because the mean of its divisors is an integer number (1344408949).

Almost surely, 2^2688817897 is an apocalyptic number.

It is an amenable number.

2688817897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2688817897 is an equidigital number, since it uses as much as digits as its factorization.

2688817897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21676032, while the sum is 64.

The square root of 2688817897 is about 51853.8127527764. The cubic root of 2688817897 is about 1390.5516670546.

The spelling of 2688817897 in words is "two billion, six hundred eighty-eight million, eight hundred seventeen thousand, eight hundred ninety-seven".