6888389 has 2 divisors, whose sum is σ = 6888390. Its totient is φ = 6888388.

The previous prime is 6888379. The next prime is 6888391. The reversal of 6888389 is 9838886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6300100 + 588289 = 2510^2 + 767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6888389 is a prime.

Together with 6888391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6888359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3444194 + 3444195.

It is an arithmetic number, because the mean of its divisors is an integer number (3444195).

Almost surely, 2^6888389 is an apocalyptic number.

It is an amenable number.

6888389 is a deficient number, since it is larger than the sum of its proper divisors (1).

6888389 is an equidigital number, since it uses as much as digits as its factorization.

6888389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 50.

The square root of 6888389 is about 2624.5740606811. The cubic root of 6888389 is about 190.2709799163.

The spelling of 6888389 in words is "six million, eight hundred eighty-eight thousand, three hundred eighty-nine".