491233 has 4 divisors (see below), whose sum is σ = 499348. Its totient is φ = 483120.

The previous prime is 491219. The next prime is 491251. The reversal of 491233 is 332194.

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

It can be written as a sum of positive squares in 2 ways, for example, as 169744 + 321489 = 412^2 + 567^2 .

It is not a de Polignac number, because 491233 - 2⁵ = 491201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491213) 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, 3966 + ... + 4087.

It is an arithmetic number, because the mean of its divisors is an integer number (124837).

2⁴⁹¹²³³ is an apocalyptic number.

It is an amenable number.

491233 is a deficient number, since it is larger than the sum of its proper divisors (8115).

491233 is an equidigital number, since it uses as much as digits as its factorization.

491233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8114.

The product of its digits is 648, while the sum is 22.

The square root of 491233 is about 700.8801609405. The cubic root of 491233 is about 78.9034230827.

The spelling of 491233 in words is "four hundred ninety-one thousand, two hundred thirty-three".