999805076833 has 2 divisors, whose sum is σ = 999805076834. Its totient is φ = 999805076832.

The previous prime is 999805076791. The next prime is 999805076843. The reversal of 999805076833 is 338670508999.

It is the 408209-th star number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 960031555344 + 39773521489 = 979812^2 + 199433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999805076833 is a prime.

It is a super-2 number, since 2×999805076833² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (999805076843) 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, 499902538416 + 499902538417.

It is an arithmetic number, because the mean of its divisors is an integer number (499902538417).

Almost surely, 2^999805076833 is an apocalyptic number.

It is an amenable number.

999805076833 is a deficient number, since it is larger than the sum of its proper divisors (1).

999805076833 is an equidigital number, since it uses as much as digits as its factorization.

999805076833 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88179840, while the sum is 67.

The spelling of 999805076833 in words is "nine hundred ninety-nine billion, eight hundred five million, seventy-six thousand, eight hundred thirty-three".