9782832821 has 2 divisors, whose sum is σ = 9782832822. Its totient is φ = 9782832820.

The previous prime is 9782832799. The next prime is 9782832853. The reversal of 9782832821 is 1282382879.

9782832821 is digitally balanced in base 2 and base 3, because in such bases 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., 7318802500 + 2464030321 = 85550^2 + 49639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9782832821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9782832821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9782132821) 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, 4891416410 + 4891416411.

It is an arithmetic number, because the mean of its divisors is an integer number (4891416411).

Almost surely, 2^9782832821 is an apocalyptic number.

It is an amenable number.

9782832821 is a deficient number, since it is larger than the sum of its proper divisors (1).

9782832821 is an equidigital number, since it uses as much as digits as its factorization.

9782832821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 50.

The square root of 9782832821 is about 98908.2040126096. The cubic root of 9782832821 is about 2138.7246616168.

The spelling of 9782832821 in words is "nine billion, seven hundred eighty-two million, eight hundred thirty-two thousand, eight hundred twenty-one".