8623220321 has 2 divisors, whose sum is σ = 8623220322. Its totient is φ = 8623220320.

The previous prime is 8623220261. The next prime is 8623220341. The reversal of 8623220321 is 1230223268.

8623220321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7807489600 + 815730721 = 88360^2 + 28561^2 .

It is a cyclic number.

It is not a de Polignac number, because 8623220321 - 2¹⁸ = 8622958177 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (8623220341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4311610160 + 4311610161.

It is an arithmetic number, because the mean of its divisors is an integer number (4311610161).

Almost surely, 2^8623220321 is an apocalyptic number.

It is an amenable number.

8623220321 is a deficient number, since it is larger than the sum of its proper divisors (1).

8623220321 is an equidigital number, since it uses as much as digits as its factorization.

8623220321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 8623220321 is about 92861.2961410727. The cubic root of 8623220321 is about 2050.6419025736.

Adding to 8623220321 its reverse (1230223268), we get a palindrome (9853443589).

The spelling of 8623220321 in words is "eight billion, six hundred twenty-three million, two hundred twenty thousand, three hundred twenty-one".