491443 has 8 divisors (see below), whose sum is σ = 516096. Its totient is φ = 467400.

The previous prime is 491429. The next prime is 491461. The reversal of 491443 is 344194.

It is a happy number.

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 491443 - 2¹³ = 483251 is a prime.

It is a Duffinian number.

491443 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (491423) 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, 2478 + ... + 2668.

It is an arithmetic number, because the mean of its divisors is an integer number (64512).

2⁴⁹¹⁴⁴³ is an apocalyptic number.

491443 is a deficient number, since it is larger than the sum of its proper divisors (24653).

491443 is a wasteful number, since it uses less digits than its factorization.

491443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305.

The product of its digits is 1728, while the sum is 25.

The square root of 491443 is about 701.0299565639. The cubic root of 491443 is about 78.9146651059.

It can be divided in two parts, 49 and 1443, that multiplied together give a palindrome (70707).

The spelling of 491443 in words is "four hundred ninety-one thousand, four hundred forty-three".