491843 has 8 divisors (see below), whose sum is σ = 546096. Its totient is φ = 439200.

The previous prime is 491837. The next prime is 491851. The reversal of 491843 is 348194.

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

It is not a de Polignac number, because 491843 - 2¹⁸ = 229699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491833) 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, 305 + ... + 1037.

It is an arithmetic number, because the mean of its divisors is an integer number (68262).

2⁴⁹¹⁸⁴³ is an apocalyptic number.

491843 is a deficient number, since it is larger than the sum of its proper divisors (54253).

491843 is a wasteful number, since it uses less digits than its factorization.

491843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805.

The product of its digits is 3456, while the sum is 29.

The square root of 491843 is about 701.3151930480. The cubic root of 491843 is about 78.9360696267.

The spelling of 491843 in words is "four hundred ninety-one thousand, eight hundred forty-three".