8385083821 has 2 divisors, whose sum is σ = 8385083822. Its totient is φ = 8385083820.

The previous prime is 8385083801. The next prime is 8385083831. The reversal of 8385083821 is 1283805838.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5734275625 + 2650808196 = 75725^2 + 51486^2 .

It is a cyclic number.

It is not a de Polignac number, because 8385083821 - 2¹¹ = 8385081773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8385083801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4192541910 + 4192541911.

It is an arithmetic number, because the mean of its divisors is an integer number (4192541911).

Almost surely, 2^8385083821 is an apocalyptic number.

It is an amenable number.

8385083821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8385083821 is an equidigital number, since it uses as much as digits as its factorization.

8385083821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 368640, while the sum is 46.

The square root of 8385083821 is about 91570.1033143460. The cubic root of 8385083821 is about 2031.5887665913.

The spelling of 8385083821 in words is "eight billion, three hundred eighty-five million, eighty-three thousand, eight hundred twenty-one".