6881513 has 2 divisors, whose sum is σ = 6881514. Its totient is φ = 6881512.

The previous prime is 6881509. The next prime is 6881551. The reversal of 6881513 is 3151886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5697769 + 1183744 = 2387^2 + 1088^2 .

It is a cyclic number.

It is not a de Polignac number, because 6881513 - 2² = 6881509 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6881513.

It is not a weakly prime, because it can be changed into another prime (6881113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3440756 + 3440757.

It is an arithmetic number, because the mean of its divisors is an integer number (3440757).

Almost surely, 2^6881513 is an apocalyptic number.

It is an amenable number.

6881513 is a deficient number, since it is larger than the sum of its proper divisors (1).

6881513 is an equidigital number, since it uses as much as digits as its factorization.

6881513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 32.

The square root of 6881513 is about 2623.2638067873. The cubic root of 6881513 is about 190.2076492490.

The spelling of 6881513 in words is "six million, eight hundred eighty-one thousand, five hundred thirteen".