2689889 has 2 divisors, whose sum is σ = 2689890. Its totient is φ = 2689888.

The previous prime is 2689877. The next prime is 2689891. The reversal of 2689889 is 9889862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2689600 + 289 = 1640^2 + 17^2 .

It is a cyclic number.

It is not a de Polignac number, because 2689889 - 2¹⁶ = 2624353 is a prime.

Together with 2689891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2689189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1344944 + 1344945.

It is an arithmetic number, because the mean of its divisors is an integer number (1344945).

2^2689889 is an apocalyptic number.

It is an amenable number.

2689889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2689889 is an equidigital number, since it uses as much as digits as its factorization.

2689889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 50.

The square root of 2689889 is about 1640.0881073894. The cubic root of 2689889 is about 139.0736286764.

The spelling of 2689889 in words is "two million, six hundred eighty-nine thousand, eight hundred eighty-nine".