6399223 has 4 divisors (see below), whose sum is σ = 6418888. Its totient is φ = 6379560.

The previous prime is 6399209. The next prime is 6399251. The reversal of 6399223 is 3229936.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6399223 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 (6399023) 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 3 ways as a sum of consecutive naturals, for example, 9336 + ... + 9997.

It is an arithmetic number, because the mean of its divisors is an integer number (1604722).

Almost surely, 2^6399223 is an apocalyptic number.

6399223 is a deficient number, since it is larger than the sum of its proper divisors (19665).

6399223 is a wasteful number, since it uses less digits than its factorization.

6399223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19664.

The product of its digits is 17496, while the sum is 34.

The square root of 6399223 is about 2529.6685553645. The cubic root of 6399223 is about 185.6560394685.

The spelling of 6399223 in words is "six million, three hundred ninety-nine thousand, two hundred twenty-three".