999811719293 has 2 divisors, whose sum is σ = 999811719294. Its totient is φ = 999811719292.

The previous prime is 999811719253. The next prime is 999811719301. The reversal of 999811719293 is 392917118999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 869030399524 + 130781319769 = 932218^2 + 361637^2 .

It is a cyclic number.

It is not a de Polignac number, because 999811719293 - 2⁶ = 999811719229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999811719253) 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, 499905859646 + 499905859647.

It is an arithmetic number, because the mean of its divisors is an integer number (499905859647).

Almost surely, 2^999811719293 is an apocalyptic number.

It is an amenable number.

999811719293 is a deficient number, since it is larger than the sum of its proper divisors (1).

999811719293 is an equidigital number, since it uses as much as digits as its factorization.

999811719293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19840464, while the sum is 68.

The spelling of 999811719293 in words is "nine hundred ninety-nine billion, eight hundred eleven million, seven hundred nineteen thousand, two hundred ninety-three".