8300821 has 4 divisors (see below), whose sum is σ = 8334144. Its totient is φ = 8267500.

The previous prime is 8300813. The next prime is 8300827. The reversal of 8300821 is 1280038.

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 an emirpimes, since its reverse is a distinct semiprime: 1280038 = 2 ⋅640019.

It is a cyclic number.

It is not a de Polignac number, because 8300821 - 2³ = 8300813 is a prime.

It is a Smith number, since the sum of its digits (22) 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.

It is a junction number, because it is equal to n+sod(n) for n = 8300792 and 8300801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8300827) 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, 16285 + ... + 16786.

It is an arithmetic number, because the mean of its divisors is an integer number (2083536).

Almost surely, 2^8300821 is an apocalyptic number.

It is an amenable number.

8300821 is a deficient number, since it is larger than the sum of its proper divisors (33323).

8300821 is a wasteful number, since it uses less digits than its factorization.

8300821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33322.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 8300821 is about 2881.1145412843. The cubic root of 8300821 is about 202.4760607782.

Adding to 8300821 its reverse (1280038), we get a palindrome (9580859).

The spelling of 8300821 in words is "eight million, three hundred thousand, eight hundred twenty-one".