999997999193 has 2 divisors, whose sum is σ = 999997999194. Its totient is φ = 999997999192.

The previous prime is 999997999153. The next prime is 999997999199. The reversal of 999997999193 is 391999799999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 994573382089 + 5424617104 = 997283^2 + 73652^2 .

It is a cyclic number.

It is not a de Polignac number, because 999997999193 - 2²² = 999993804889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (999997999199) 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, 499998999596 + 499998999597.

It is an arithmetic number, because the mean of its divisors is an integer number (499998999597).

Almost surely, 2^999997999193 is an apocalyptic number.

It is an amenable number.

999997999193 is a deficient number, since it is larger than the sum of its proper divisors (1).

999997999193 is an equidigital number, since it uses as much as digits as its factorization.

999997999193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8135830269, while the sum is 92.

The spelling of 999997999193 in words is "nine hundred ninety-nine billion, nine hundred ninety-seven million, nine hundred ninety-nine thousand, one hundred ninety-three".