8065829021 has 2 divisors, whose sum is σ = 8065829022. Its totient is φ = 8065829020.

The previous prime is 8065829003. The next prime is 8065829041. The reversal of 8065829021 is 1209285608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7816504921 + 249324100 = 88411^2 + 15790^2 .

It is a cyclic number.

It is not a de Polignac number, because 8065829021 - 2¹⁸ = 8065566877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8065829021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8065829041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4032914510 + 4032914511.

It is an arithmetic number, because the mean of its divisors is an integer number (4032914511).

Almost surely, 2^8065829021 is an apocalyptic number.

It is an amenable number.

8065829021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8065829021 is an equidigital number, since it uses as much as digits as its factorization.

8065829021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 8065829021 is about 89809.9605890126. The cubic root of 8065829021 is about 2005.4707734243.

The spelling of 8065829021 in words is "eight billion, sixty-five million, eight hundred twenty-nine thousand, twenty-one".