8819821897 has 2 divisors, whose sum is σ = 8819821898. Its totient is φ = 8819821896.

The previous prime is 8819821877. The next prime is 8819821919. The reversal of 8819821897 is 7981289188.

8819821897 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., 7760905216 + 1058916681 = 88096^2 + 32541^2 .

It is a cyclic number.

It is not a de Polignac number, because 8819821897 - 2¹⁵ = 8819789129 is a prime.

It is not a weakly prime, because it can be changed into another prime (8819821877) 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, 4409910948 + 4409910949.

It is an arithmetic number, because the mean of its divisors is an integer number (4409910949).

Almost surely, 2^8819821897 is an apocalyptic number.

It is an amenable number.

8819821897 is a deficient number, since it is larger than the sum of its proper divisors (1).

8819821897 is an equidigital number, since it uses as much as digits as its factorization.

8819821897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4644864, while the sum is 61.

The square root of 8819821897 is about 93913.9068349305. The cubic root of 8819821897 is about 2066.1092010670.

The spelling of 8819821897 in words is "eight billion, eight hundred nineteen million, eight hundred twenty-one thousand, eight hundred ninety-seven".