200001000191 has 4 divisors (see below), whose sum is σ = 200097667800. Its totient is φ = 199904332584.

The previous prime is 200001000187. The next prime is 200001000233. The reversal of 200001000191 is 191000100002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 200001000191 - 2² = 200001000187 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200001050191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48330701 + ... + 48334838.

It is an arithmetic number, because the mean of its divisors is an integer number (50024416950).

Almost surely, 2^200001000191 is an apocalyptic number.

200001000191 is a deficient number, since it is larger than the sum of its proper divisors (96667609).

200001000191 is an equidigital number, since it uses as much as digits as its factorization.

200001000191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96667608.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 200001000191 its reverse (191000100002), we get a palindrome (391001100193).

The spelling of 200001000191 in words is "two hundred billion, one million, one hundred ninety-one", and thus it is an aban number.