8964821 has 2 divisors, whose sum is σ = 8964822. Its totient is φ = 8964820.

The previous prime is 8964817. The next prime is 8964853. The reversal of 8964821 is 1284698.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6027025 + 2937796 = 2455^2 + 1714^2 .

It is a cyclic number.

It is not a de Polignac number, because 8964821 - 2² = 8964817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8964121) 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 as a sum of consecutive naturals, namely, 4482410 + 4482411.

It is an arithmetic number, because the mean of its divisors is an integer number (4482411).

Almost surely, 2^8964821 is an apocalyptic number.

It is an amenable number.

8964821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8964821 is an equidigital number, since it uses as much as digits as its factorization.

8964821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 38.

The square root of 8964821 is about 2994.1310926544. The cubic root of 8964821 is about 207.7370089039.

The spelling of 8964821 in words is "eight million, nine hundred sixty-four thousand, eight hundred twenty-one".