999997999199 has 2 divisors, whose sum is σ = 999997999200. Its totient is φ = 999997999198.

The previous prime is 999997999193. The next prime is 999997999201. The reversal of 999997999199 is 991999799999.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999997999199 is a prime.

Together with 999997999201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999997999193) 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, 499998999599 + 499998999600.

It is an arithmetic number, because the mean of its divisors is an integer number (499998999600).

Almost surely, 2^999997999199 is an apocalyptic number.

999997999199 is a deficient number, since it is larger than the sum of its proper divisors (1).

999997999199 is an equidigital number, since it uses as much as digits as its factorization.

999997999199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24407490807, while the sum is 98.

The spelling of 999997999199 in words is "nine hundred ninety-nine billion, nine hundred ninety-seven million, nine hundred ninety-nine thousand, one hundred ninety-nine".