671223 has 8 divisors (see below), whose sum is σ = 1022848. Its totient is φ = 383544.

The previous prime is 671219. The next prime is 671233. The reversal of 671223 is 322176.

It is a happy number.

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

It is not a de Polignac number, because 671223 - 2² = 671219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 31963 = 671223 / (6 + 7 + 1 + 2 + 2 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 671223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671233) 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, 15961 + ... + 16002.

It is an arithmetic number, because the mean of its divisors is an integer number (127856).

2⁶⁷¹²²³ is an apocalyptic number.

671223 is a deficient number, since it is larger than the sum of its proper divisors (351625).

671223 is a wasteful number, since it uses less digits than its factorization.

671223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31973.

The product of its digits is 504, while the sum is 21.

The square root of 671223 is about 819.2820027317. The cubic root of 671223 is about 87.5566109848.

Adding to 671223 its reverse (322176), we get a palindrome (993399).

The spelling of 671223 in words is "six hundred seventy-one thousand, two hundred twenty-three".