2686889 has 2 divisors, whose sum is σ = 2686890. Its totient is φ = 2686888.

The previous prime is 2686861. The next prime is 2686891. The reversal of 2686889 is 9886862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1605289 + 1081600 = 1267^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 2686889 - 2¹² = 2682793 is a prime.

Together with 2686891, 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 (2686819) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1343444 + 1343445.

It is an arithmetic number, because the mean of its divisors is an integer number (1343445).

2^2686889 is an apocalyptic number.

It is an amenable number.

2686889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2686889 is an equidigital number, since it uses as much as digits as its factorization.

2686889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 47.

The square root of 2686889 is about 1639.1732672296. The cubic root of 2686889 is about 139.0219070763.

The spelling of 2686889 in words is "two million, six hundred eighty-six thousand, eight hundred eighty-nine".