2689131889 has 2 divisors, whose sum is σ = 2689131890. Its totient is φ = 2689131888.

The previous prime is 2689131839. The next prime is 2689131919. The reversal of 2689131889 is 9881319862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2514019600 + 175112289 = 50140^2 + 13233^2 .

It is a cyclic number.

It is not a de Polignac number, because 2689131889 - 2²¹ = 2687034737 is a prime.

It is not a weakly prime, because it can be changed into another prime (2689131839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344565944 + 1344565945.

It is an arithmetic number, because the mean of its divisors is an integer number (1344565945).

Almost surely, 2^2689131889 is an apocalyptic number.

It is an amenable number.

2689131889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2689131889 is an equidigital number, since it uses as much as digits as its factorization.

2689131889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 55.

The square root of 2689131889 is about 51856.8403298928. The cubic root of 2689131889 is about 1390.6057930834.

The spelling of 2689131889 in words is "two billion, six hundred eighty-nine million, one hundred thirty-one thousand, eight hundred eighty-nine".