805399316089 has 2 divisors, whose sum is σ = 805399316090. Its totient is φ = 805399316088.

The previous prime is 805399316077. The next prime is 805399316237. The reversal of 805399316089 is 980613993508.

805399316089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 803025677689 + 2373638400 = 896117^2 + 48720^2 .

It is a cyclic number.

It is not a de Polignac number, because 805399316089 - 2⁷ = 805399315961 is a prime.

It is not a weakly prime, because it can be changed into another prime (805399311089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402699658044 + 402699658045.

It is an arithmetic number, because the mean of its divisors is an integer number (402699658045).

Almost surely, 2^805399316089 is an apocalyptic number.

It is an amenable number.

805399316089 is a deficient number, since it is larger than the sum of its proper divisors (1).

805399316089 is an equidigital number, since it uses as much as digits as its factorization.

805399316089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12597120, while the sum is 61.

The spelling of 805399316089 in words is "eight hundred five billion, three hundred ninety-nine million, three hundred sixteen thousand, eighty-nine".