6891889 has 8 divisors (see below), whose sum is σ = 7489280. Its totient is φ = 6318000.

The previous prime is 6891887. The next prime is 6891901. The reversal of 6891889 is 9881986.

6891889 = T₂₁₄₂ + T₂₁₄₃ + T₂₁₄₄.

It is a happy number.

6891889 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6891889 - 2¹ = 6891887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6891883) 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 7 ways as a sum of consecutive naturals, for example, 5262 + ... + 6439.

It is an arithmetic number, because the mean of its divisors is an integer number (936160).

Almost surely, 2^6891889 is an apocalyptic number.

6891889 is the 2144-th centered triangular number.

It is an amenable number.

6891889 is a deficient number, since it is larger than the sum of its proper divisors (597391).

6891889 is a wasteful number, since it uses less digits than its factorization.

6891889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11751.

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

The square root of 6891889 is about 2625.2407508646. The cubic root of 6891889 is about 190.3032001094.

The spelling of 6891889 in words is "six million, eight hundred ninety-one thousand, eight hundred eighty-nine".