6889891 has 2 divisors, whose sum is σ = 6889892. Its totient is φ = 6889890.

The previous prime is 6889873. The next prime is 6889901. The reversal of 6889891 is 1989886.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6889891 - 2⁵ = 6889859 is a prime.

It is not a weakly prime, because it can be changed into another prime (6889391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3444945 + 3444946.

It is an arithmetic number, because the mean of its divisors is an integer number (3444946).

Almost surely, 2^6889891 is an apocalyptic number.

6889891 is a deficient number, since it is larger than the sum of its proper divisors (1).

6889891 is an equidigital number, since it uses as much as digits as its factorization.

6889891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 49.

The square root of 6889891 is about 2624.8601867528. The cubic root of 6889891 is about 190.2848083186.

The spelling of 6889891 in words is "six million, eight hundred eighty-nine thousand, eight hundred ninety-one".