2689727917 has 2 divisors, whose sum is σ = 2689727918. Its totient is φ = 2689727916.

The previous prime is 2689727903. The next prime is 2689727921. The reversal of 2689727917 is 7197279862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1407300196 + 1282427721 = 37514^2 + 35811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2689727917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2689727017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344863958 + 1344863959.

It is an arithmetic number, because the mean of its divisors is an integer number (1344863959).

Almost surely, 2^2689727917 is an apocalyptic number.

It is an amenable number.

2689727917 is a deficient number, since it is larger than the sum of its proper divisors (1).

2689727917 is an equidigital number, since it uses as much as digits as its factorization.

2689727917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5334336, while the sum is 58.

The square root of 2689727917 is about 51862.5868714626. The cubic root of 2689727917 is about 1390.7085249681.

The spelling of 2689727917 in words is "two billion, six hundred eighty-nine million, seven hundred twenty-seven thousand, nine hundred seventeen".