8840382821 has 2 divisors, whose sum is σ = 8840382822. Its totient is φ = 8840382820.

The previous prime is 8840382769. The next prime is 8840382827. The reversal of 8840382821 is 1282830488.

8840382821 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., 5942713921 + 2897668900 = 77089^2 + 53830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8840382821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8840382827) 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, 4420191410 + 4420191411.

It is an arithmetic number, because the mean of its divisors is an integer number (4420191411).

Almost surely, 2^8840382821 is an apocalyptic number.

It is an amenable number.

8840382821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8840382821 is an equidigital number, since it uses as much as digits as its factorization.

8840382821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 196608, while the sum is 44.

The square root of 8840382821 is about 94023.3099874707. The cubic root of 8840382821 is about 2067.7134717856.

The spelling of 8840382821 in words is "eight billion, eight hundred forty million, three hundred eighty-two thousand, eight hundred twenty-one".