6389 has 2 divisors, whose sum is σ = 6390.
Its totient is φ = 6388.
The previous prime is 6379. The next prime is 6397. The reversal of 6389 is 9836.
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 3364 + 3025 = 58^2 + 55^2
It is a cyclic number.
It is not a de Polignac number, because 6389 - 24 = 6373 is a prime.
It is an alternating number because its digits alternate between even and odd.
It is a plaindrome in base 11.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 6389.
It is not a weakly prime, because it can be changed into another prime (6329) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3194 + 3195.
It is an arithmetic number, because the mean of its divisors is an integer number (3195).
26389 is an apocalyptic number.
It is an amenable number.
6389 is a deficient number, since it is larger than the sum of its proper divisors (1).
6389 is an equidigital number, since it uses as much as digits as its factorization.
6389 is an evil number, because the sum of its binary digits is even.
The product of its digits is 1296, while the sum is 26.
The square root of 6389 is about 79.9312204336.
The cubic root of 6389 is about 18.5557122601.
Note that the first 3 decimals are identical.
The spelling of 6389 in words is "six thousand, three hundred eighty-nine".