6391223 has 8 divisors (see below), whose sum is σ = 6704400. Its totient is φ = 6084288.

The previous prime is 6391199. The next prime is 6391241. The reversal of 6391223 is 3221936.

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 6391223 - 2¹⁰ = 6390199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6391192 and 6391201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6391243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608 + ... + 3626.

It is an arithmetic number, because the mean of its divisors is an integer number (838050).

Almost surely, 2^6391223 is an apocalyptic number.

6391223 is a deficient number, since it is larger than the sum of its proper divisors (313177).

6391223 is a wasteful number, since it uses less digits than its factorization.

6391223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3121.

The product of its digits is 1944, while the sum is 26.

The square root of 6391223 is about 2528.0868260406. The cubic root of 6391223 is about 185.5786411305.

The spelling of 6391223 in words is "six million, three hundred ninety-one thousand, two hundred twenty-three".