6861191 has 2 divisors, whose sum is σ = 6861192. Its totient is φ = 6861190.

The previous prime is 6861187. The next prime is 6861203. The reversal of 6861191 is 1911686.

6861191 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6861191 - 2² = 6861187 is a prime.

It is a Chen prime.

It is a nialpdrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6861121) 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, 3430595 + 3430596.

It is an arithmetic number, because the mean of its divisors is an integer number (3430596).

Almost surely, 2^6861191 is an apocalyptic number.

6861191 is a deficient number, since it is larger than the sum of its proper divisors (1).

6861191 is an equidigital number, since it uses as much as digits as its factorization.

6861191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 32.

The square root of 6861191 is about 2619.3875238307. The cubic root of 6861191 is about 190.0202286865.

The spelling of 6861191 in words is "six million, eight hundred sixty-one thousand, one hundred ninety-one".