8464622021 has 2 divisors, whose sum is σ = 8464622022. Its totient is φ = 8464622020.

The previous prime is 8464621973. The next prime is 8464622069. The reversal of 8464622021 is 1202264648.

8464622021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (8464621973) and next prime (8464622069).

It can be written as a sum of positive squares in only one way, i.e., 7425268900 + 1039353121 = 86170^2 + 32239^2 .

It is a cyclic number.

It is not a de Polignac number, because 8464622021 - 2³⁰ = 7390880197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8464622321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4232311010 + 4232311011.

It is an arithmetic number, because the mean of its divisors is an integer number (4232311011).

Almost surely, 2^8464622021 is an apocalyptic number.

It is an amenable number.

8464622021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8464622021 is an equidigital number, since it uses as much as digits as its factorization.

8464622021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 8464622021 is about 92003.3804868060. The cubic root of 8464622021 is about 2037.9922272240.

Adding to 8464622021 its reverse (1202264648), we get a palindrome (9666886669).

The spelling of 8464622021 in words is "eight billion, four hundred sixty-four million, six hundred twenty-two thousand, twenty-one".