8905384921 has 2 divisors, whose sum is σ = 8905384922. Its totient is φ = 8905384920.

The previous prime is 8905384903. The next prime is 8905384981. The reversal of 8905384921 is 1294835098.

8905384921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7980920896 + 924464025 = 89336^2 + 30405^2 .

It is a cyclic number.

It is not a de Polignac number, because 8905384921 - 2²⁷ = 8771167193 is a prime.

It is not a weakly prime, because it can be changed into another prime (8905384981) 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, 4452692460 + 4452692461.

It is an arithmetic number, because the mean of its divisors is an integer number (4452692461).

Almost surely, 2^8905384921 is an apocalyptic number.

It is an amenable number.

8905384921 is a deficient number, since it is larger than the sum of its proper divisors (1).

8905384921 is an equidigital number, since it uses as much as digits as its factorization.

8905384921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 8905384921 is about 94368.3470290754. The cubic root of 8905384921 is about 2072.7689706075.

The spelling of 8905384921 in words is "eight billion, nine hundred five million, three hundred eighty-four thousand, nine hundred twenty-one".