8104073821 has 2 divisors, whose sum is σ = 8104073822. Its totient is φ = 8104073820.

The previous prime is 8104073779. The next prime is 8104073839. The reversal of 8104073821 is 1283704018.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6273432025 + 1830641796 = 79205^2 + 42786^2 .

It is a cyclic number.

It is not a de Polignac number, because 8104073821 - 2²¹ = 8101976669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8104073881) 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, 4052036910 + 4052036911.

It is an arithmetic number, because the mean of its divisors is an integer number (4052036911).

Almost surely, 2^8104073821 is an apocalyptic number.

It is an amenable number.

8104073821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8104073821 is an equidigital number, since it uses as much as digits as its factorization.

8104073821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 8104073821 is about 90022.6294939222. The cubic root of 8104073821 is about 2008.6354790045.

Adding to 8104073821 its reverse (1283704018), we get a palindrome (9387777839).

The spelling of 8104073821 in words is "eight billion, one hundred four million, seventy-three thousand, eight hundred twenty-one".