8821905613 has 2 divisors, whose sum is σ = 8821905614. Its totient is φ = 8821905612.

The previous prime is 8821905563. The next prime is 8821905641. The reversal of 8821905613 is 3165091288.

8821905613 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., 7576309764 + 1245595849 = 87042^2 + 35293^2 .

It is a cyclic number.

It is not a de Polignac number, because 8821905613 - 2¹³ = 8821897421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8821905613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8821905913) 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, 4410952806 + 4410952807.

It is an arithmetic number, because the mean of its divisors is an integer number (4410952807).

Almost surely, 2^8821905613 is an apocalyptic number.

It is an amenable number.

8821905613 is a deficient number, since it is larger than the sum of its proper divisors (1).

8821905613 is an equidigital number, since it uses as much as digits as its factorization.

8821905613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 8821905613 is about 93924.9999361192. Note that the first 4 decimals coincide. The cubic root of 8821905613 is about 2066.2718969376.

The spelling of 8821905613 in words is "eight billion, eight hundred twenty-one million, nine hundred five thousand, six hundred thirteen".