8068871621 has 2 divisors, whose sum is σ = 8068871622. Its totient is φ = 8068871620.

The previous prime is 8068871567. The next prime is 8068871651. The reversal of 8068871621 is 1261788608.

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., 5039580100 + 3029291521 = 70990^2 + 55039^2 .

It is a cyclic number.

It is not a de Polignac number, because 8068871621 - 2³⁰ = 6995129797 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8068871651) 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, 4034435810 + 4034435811.

It is an arithmetic number, because the mean of its divisors is an integer number (4034435811).

Almost surely, 2^8068871621 is an apocalyptic number.

It is an amenable number.

8068871621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8068871621 is an equidigital number, since it uses as much as digits as its factorization.

8068871621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 258048, while the sum is 47.

The square root of 8068871621 is about 89826.8980929432. The cubic root of 8068871621 is about 2005.7229102794.

The spelling of 8068871621 in words is "eight billion, sixty-eight million, eight hundred seventy-one thousand, six hundred twenty-one".