6318881 has 2 divisors, whose sum is σ = 6318882. Its totient is φ = 6318880.

The previous prime is 6318877. The next prime is 6318889. The reversal of 6318881 is 1888136.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5664400 + 654481 = 2380^2 + 809^2 .

It is a cyclic number.

It is not a de Polignac number, because 6318881 - 2² = 6318877 is a prime.

It is a super-2 number, since 2×6318881² = 79856514184322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6318889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3159440 + 3159441.

It is an arithmetic number, because the mean of its divisors is an integer number (3159441).

Almost surely, 2^6318881 is an apocalyptic number.

It is an amenable number.

6318881 is a deficient number, since it is larger than the sum of its proper divisors (1).

6318881 is an equidigital number, since it uses as much as digits as its factorization.

6318881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 35.

The square root of 6318881 is about 2513.7384509929. The cubic root of 6318881 is about 184.8757968371.

The spelling of 6318881 in words is "six million, three hundred eighteen thousand, eight hundred eighty-one".