793821 has 16 divisors (see below), whose sum is σ = 1224704. Its totient is φ = 447984.

The previous prime is 793813. The next prime is 793841. The reversal of 793821 is 128397.

It is a happy number.

793821 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 793821 - 2³ = 793813 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

793821 is strictly pandigital in base 7.

793821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (793841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1980 + ... + 2346.

It is an arithmetic number, because the mean of its divisors is an integer number (76544).

2⁷⁹³⁸²¹ is an apocalyptic number.

It is an amenable number.

793821 is a deficient number, since it is larger than the sum of its proper divisors (430883).

793821 is a wasteful number, since it uses less digits than its factorization.

793821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480.

The product of its digits is 3024, while the sum is 30.

The square root of 793821 is about 890.9663293301. The cubic root of 793821 is about 92.5921555397.

The spelling of 793821 in words is "seven hundred ninety-three thousand, eight hundred twenty-one".