6923221 has 8 divisors (see below), whose sum is σ = 7076160. Its totient is φ = 6772128.

The previous prime is 6923209. The next prime is 6923243. The reversal of 6923221 is 1223296.

It is a happy number.

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 6923221 - 2⁹ = 6922709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6923321) 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 7 ways as a sum of consecutive naturals, for example, 9160 + ... + 9886.

It is an arithmetic number, because the mean of its divisors is an integer number (884520).

Almost surely, 2^6923221 is an apocalyptic number.

It is an amenable number.

6923221 is a deficient number, since it is larger than the sum of its proper divisors (152939).

6923221 is a wasteful number, since it uses less digits than its factorization.

6923221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923.

The product of its digits is 1296, while the sum is 25.

The square root of 6923221 is about 2631.2014366065. The cubic root of 6923221 is about 190.5911505247.

The spelling of 6923221 in words is "six million, nine hundred twenty-three thousand, two hundred twenty-one".