8096821 has 4 divisors (see below), whose sum is σ = 8315692. Its totient is φ = 7877952.

The previous prime is 8096819. The next prime is 8096827. The reversal of 8096821 is 1286908.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5244100 + 2852721 = 2290^2 + 1689^2 .

It is a cyclic number.

It is not a de Polignac number, because 8096821 - 2¹ = 8096819 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8096827) 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, 109380 + ... + 109453.

It is an arithmetic number, because the mean of its divisors is an integer number (2078923).

Almost surely, 2^8096821 is an apocalyptic number.

It is an amenable number.

8096821 is a deficient number, since it is larger than the sum of its proper divisors (218871).

8096821 is a wasteful number, since it uses less digits than its factorization.

8096821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218870.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 8096821 is about 2845.4913459717. The cubic root of 8096821 is about 200.8036084096.

The spelling of 8096821 in words is "eight million, ninety-six thousand, eight hundred twenty-one".