6871811 has 6 divisors (see below), whose sum is σ = 7117812. Its totient is φ = 6634040.

The previous prime is 6871807. The next prime is 6871829. The reversal of 6871811 is 1181786.

It is not a de Polignac number, because 6871811 - 2² = 6871807 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6871831) 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 in 5 ways as a sum of consecutive naturals, for example, 3245 + ... + 4926.

It is an arithmetic number, because the mean of its divisors is an integer number (1186302).

Almost surely, 2^6871811 is an apocalyptic number.

6871811 is a deficient number, since it is larger than the sum of its proper divisors (246001).

6871811 is an equidigital number, since it uses as much as digits as its factorization.

6871811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8229 (or 8200 counting only the distinct ones).

The product of its digits is 2688, while the sum is 32.

The square root of 6871811 is about 2621.4139314500. The cubic root of 6871811 is about 190.1182182113.

The spelling of 6871811 in words is "six million, eight hundred seventy-one thousand, eight hundred eleven".