6891223 has 6 divisors (see below), whose sum is σ = 7057104. Its totient is φ = 6729156.

The previous prime is 6891221. The next prime is 6891251. The reversal of 6891223 is 3221986.

It is not a de Polignac number, because 6891223 - 2¹ = 6891221 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6891221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15 + ... + 3712.

It is an arithmetic number, because the mean of its divisors is an integer number (1176184).

Almost surely, 2^6891223 is an apocalyptic number.

6891223 is a deficient number, since it is larger than the sum of its proper divisors (165881).

6891223 is an equidigital number, since it uses as much as digits as its factorization.

6891223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3813 (or 3770 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 6891223 is about 2625.1139022907. The cubic root of 6891223 is about 190.2970699075.

The spelling of 6891223 in words is "six million, eight hundred ninety-one thousand, two hundred twenty-three".