6881191 has 2 divisors, whose sum is σ = 6881192. Its totient is φ = 6881190.

The previous prime is 6881183. The next prime is 6881197. The reversal of 6881191 is 1911886.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6881191 - 2³ = 6881183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6881197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3440595 + 3440596.

It is an arithmetic number, because the mean of its divisors is an integer number (3440596).

Almost surely, 2^6881191 is an apocalyptic number.

6881191 is a deficient number, since it is larger than the sum of its proper divisors (1).

6881191 is an equidigital number, since it uses as much as digits as its factorization.

6881191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 34.

The square root of 6881191 is about 2623.2024321428. The cubic root of 6881191 is about 190.2046824684.

The spelling of 6881191 in words is "six million, eight hundred eighty-one thousand, one hundred ninety-one".