6378389 has 2 divisors, whose sum is σ = 6378390. Its totient is φ = 6378388.

The previous prime is 6378371. The next prime is 6378397. The reversal of 6378389 is 9838736.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4765489 + 1612900 = 2183^2 + 1270^2 .

It is a cyclic number.

It is not a de Polignac number, because 6378389 - 2⁸ = 6378133 is a prime.

It is an Ulam number.

It is a zygodrome in base 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6378989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3189194 + 3189195.

It is an arithmetic number, because the mean of its divisors is an integer number (3189195).

Almost surely, 2^6378389 is an apocalyptic number.

It is an amenable number.

6378389 is a deficient number, since it is larger than the sum of its proper divisors (1).

6378389 is an equidigital number, since it uses as much as digits as its factorization.

6378389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 6378389 is about 2525.5472674254. The cubic root of 6378389 is about 185.4543398152.

The spelling of 6378389 in words is "six million, three hundred seventy-eight thousand, three hundred eighty-nine".