473821 has 4 divisors (see below), whose sum is σ = 475200. Its totient is φ = 472444.

The previous prime is 473789. The next prime is 473833. The reversal of 473821 is 128374.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 128374 = 2 ⋅64187.

It is a cyclic number.

It is not a de Polignac number, because 473821 - 2⁵ = 473789 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (473861) 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, 300 + ... + 1018.

It is an arithmetic number, because the mean of its divisors is an integer number (118800).

2⁴⁷³⁸²¹ is an apocalyptic number.

It is an amenable number.

473821 is a deficient number, since it is larger than the sum of its proper divisors (1379).

473821 is an equidigital number, since it uses as much as digits as its factorization.

473821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378.

The product of its digits is 1344, while the sum is 25.

The square root of 473821 is about 688.3465696871. The cubic root of 473821 is about 77.9599290124.

The spelling of 473821 in words is "four hundred seventy-three thousand, eight hundred twenty-one".