998995806199 has 2 divisors, whose sum is σ = 998995806200. Its totient is φ = 998995806198.

The previous prime is 998995806173. The next prime is 998995806251. The reversal of 998995806199 is 991608599899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998995806199 - 2⁷ = 998995806071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998995806139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499497903099 + 499497903100.

It is an arithmetic number, because the mean of its divisors is an integer number (499497903100).

Almost surely, 2^998995806199 is an apocalyptic number.

998995806199 is a deficient number, since it is larger than the sum of its proper divisors (1).

998995806199 is an equidigital number, since it uses as much as digits as its factorization.

998995806199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1020366720, while the sum is 82.

The spelling of 998995806199 in words is "nine hundred ninety-eight billion, nine hundred ninety-five million, eight hundred six thousand, one hundred ninety-nine".