2851688689 has 2 divisors, whose sum is σ = 2851688690. Its totient is φ = 2851688688.

The previous prime is 2851688617. The next prime is 2851688699. The reversal of 2851688689 is 9868861582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2523354289 + 328334400 = 50233^2 + 18120^2 .

It is a cyclic number.

It is not a de Polignac number, because 2851688689 - 2⁷ = 2851688561 is a prime.

It is not a weakly prime, because it can be changed into another prime (2851688699) 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, 1425844344 + 1425844345.

It is an arithmetic number, because the mean of its divisors is an integer number (1425844345).

Almost surely, 2^2851688689 is an apocalyptic number.

It is an amenable number.

2851688689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2851688689 is an equidigital number, since it uses as much as digits as its factorization.

2851688689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13271040, while the sum is 61.

The square root of 2851688689 is about 53401.2049395891. The cubic root of 2851688689 is about 1418.0799098294.

The spelling of 2851688689 in words is "two billion, eight hundred fifty-one million, six hundred eighty-eight thousand, six hundred eighty-nine".