999888793 has 2 divisors, whose sum is σ = 999888794. Its totient is φ = 999888792.

The previous prime is 999888733. The next prime is 999888823. The reversal of 999888793 is 397888999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 949379344 + 50509449 = 30812^2 + 7107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999888793 is a prime.

It is not a weakly prime, because it can be changed into another prime (999888733) 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, 499944396 + 499944397.

It is an arithmetic number, because the mean of its divisors is an integer number (499944397).

Almost surely, 2^999888793 is an apocalyptic number.

It is an amenable number.

999888793 is a deficient number, since it is larger than the sum of its proper divisors (1).

999888793 is an equidigital number, since it uses as much as digits as its factorization.

999888793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70543872, while the sum is 70.

The square root of 999888793 is about 31621.0182157375. The cubic root of 999888793 is about 999.9629296258.

The spelling of 999888793 in words is "nine hundred ninety-nine million, eight hundred eighty-eight thousand, seven hundred ninety-three".