8321630209 has 2 divisors, whose sum is σ = 8321630210. Its totient is φ = 8321630208.

The previous prime is 8321630201. The next prime is 8321630221. The reversal of 8321630209 is 9020361238.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8317440000 + 4190209 = 91200^2 + 2047^2 .

It is a cyclic number.

It is not a de Polignac number, because 8321630209 - 2³ = 8321630201 is a prime.

It is not a weakly prime, because it can be changed into another prime (8321630201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4160815104 + 4160815105.

It is an arithmetic number, because the mean of its divisors is an integer number (4160815105).

It is a Proth number, since it is equal to 63489 ⋅ 2¹⁷ + 1 and 63489 < 2¹⁷.

Almost surely, 2^8321630209 is an apocalyptic number.

It is an amenable number.

8321630209 is a deficient number, since it is larger than the sum of its proper divisors (1).

8321630209 is an equidigital number, since it uses as much as digits as its factorization.

8321630209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 8321630209 is about 91222.9697444673. The cubic root of 8321630209 is about 2026.4511436753.

The spelling of 8321630209 in words is "eight billion, three hundred twenty-one million, six hundred thirty thousand, two hundred nine".