491223 has 4 divisors (see below), whose sum is σ = 654968. Its totient is φ = 327480.

The previous prime is 491219. The next prime is 491251. The reversal of 491223 is 322194.

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

It is not a de Polignac number, because 491223 - 2² = 491219 is a prime.

It is a D-number.

It is a Duffinian number.

491223 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 491223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81868 + ... + 81873.

It is an arithmetic number, because the mean of its divisors is an integer number (163742).

2⁴⁹¹²²³ is an apocalyptic number.

491223 is a deficient number, since it is larger than the sum of its proper divisors (163745).

491223 is a wasteful number, since it uses less digits than its factorization.

491223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163744.

The product of its digits is 432, while the sum is 21.

The square root of 491223 is about 700.8730270170. The cubic root of 491223 is about 78.9028876684.

The spelling of 491223 in words is "four hundred ninety-one thousand, two hundred twenty-three".