2685517673 has 2 divisors, whose sum is σ = 2685517674. Its totient is φ = 2685517672.

The previous prime is 2685517633. The next prime is 2685517699. The reversal of 2685517673 is 3767155862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1414737769 + 1270779904 = 37613^2 + 35648^2 .

It is a cyclic number.

It is not a de Polignac number, because 2685517673 - 2²⁰ = 2684469097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2685517603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1342758836 + 1342758837.

It is an arithmetic number, because the mean of its divisors is an integer number (1342758837).

Almost surely, 2^2685517673 is an apocalyptic number.

It is an amenable number.

2685517673 is a deficient number, since it is larger than the sum of its proper divisors (1).

2685517673 is an equidigital number, since it uses as much as digits as its factorization.

2685517673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2116800, while the sum is 50.

The square root of 2685517673 is about 51821.9805970401. The cubic root of 2685517673 is about 1389.9825184558.

The spelling of 2685517673 in words is "two billion, six hundred eighty-five million, five hundred seventeen thousand, six hundred seventy-three".