8294821 has 2 divisors, whose sum is σ = 8294822. Its totient is φ = 8294820.

The previous prime is 8294809. The next prime is 8294837. The reversal of 8294821 is 1284928.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5452225 + 2842596 = 2335^2 + 1686^2 .

It is a cyclic number.

It is not a de Polignac number, because 8294821 - 2⁹ = 8294309 is a prime.

8294821 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8294851) 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 as a sum of consecutive naturals, namely, 4147410 + 4147411.

It is an arithmetic number, because the mean of its divisors is an integer number (4147411).

Almost surely, 2^8294821 is an apocalyptic number.

It is an amenable number.

8294821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8294821 is an equidigital number, since it uses as much as digits as its factorization.

8294821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 34.

The square root of 8294821 is about 2880.0730893503. The cubic root of 8294821 is about 202.4272644327.

The spelling of 8294821 in words is "eight million, two hundred ninety-four thousand, eight hundred twenty-one".