6378881 has 2 divisors, whose sum is σ = 6378882. Its totient is φ = 6378880.

The previous prime is 6378877. The next prime is 6378907. The reversal of 6378881 is 1888736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6250000 + 128881 = 2500^2 + 359^2 .

It is a cyclic number.

It is not a de Polignac number, because 6378881 - 2² = 6378877 is a prime.

It is a super-2 number, since 2×6378881² = 81380245624322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6378871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3189440 + 3189441.

It is an arithmetic number, because the mean of its divisors is an integer number (3189441).

Almost surely, 2^6378881 is an apocalyptic number.

It is an amenable number.

6378881 is a deficient number, since it is larger than the sum of its proper divisors (1).

6378881 is an equidigital number, since it uses as much as digits as its factorization.

6378881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 41.

The square root of 6378881 is about 2525.6446701783. The cubic root of 6378881 is about 185.4591080615.

The spelling of 6378881 in words is "six million, three hundred seventy-eight thousand, eight hundred eighty-one".