491793 has 8 divisors (see below), whose sum is σ = 694368. Its totient is φ = 308544.

The previous prime is 491789. The next prime is 491797. The reversal of 491793 is 397194.

It is an interprime number because it is at equal distance from previous prime (491789) and next prime (491797).

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

It is not a de Polignac number, because 491793 - 2² = 491789 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

491793 is a lucky number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (491797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4771 + ... + 4872.

It is an arithmetic number, because the mean of its divisors is an integer number (86796).

2⁴⁹¹⁷⁹³ is an apocalyptic number.

It is an amenable number.

491793 is a deficient number, since it is larger than the sum of its proper divisors (202575).

491793 is a wasteful number, since it uses less digits than its factorization.

491793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9663.

The product of its digits is 6804, while the sum is 33.

The square root of 491793 is about 701.2795448322. The cubic root of 491793 is about 78.9333946964.

The spelling of 491793 in words is "four hundred ninety-one thousand, seven hundred ninety-three".