8093613721 has 2 divisors, whose sum is σ = 8093613722. Its totient is φ = 8093613720.

The previous prime is 8093613719. The next prime is 8093613739. The reversal of 8093613721 is 1273163908.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7968061696 + 125552025 = 89264^2 + 11205^2 .

It is a cyclic number.

It is not a de Polignac number, because 8093613721 - 2¹ = 8093613719 is a prime.

Together with 8093613719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8093613791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4046806860 + 4046806861.

It is an arithmetic number, because the mean of its divisors is an integer number (4046806861).

Almost surely, 2^8093613721 is an apocalyptic number.

It is an amenable number.

8093613721 is a deficient number, since it is larger than the sum of its proper divisors (1).

8093613721 is an equidigital number, since it uses as much as digits as its factorization.

8093613721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 8093613721 is about 89964.5136762268. The cubic root of 8093613721 is about 2007.7709107843.

The spelling of 8093613721 in words is "eight billion, ninety-three million, six hundred thirteen thousand, seven hundred twenty-one".