199844904103 has 4 divisors (see below), whose sum is σ = 215217589048. Its totient is φ = 184472219160.

The previous prime is 199844904059. The next prime is 199844904143. The reversal of 199844904103 is 301409448991.

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 199844904103 - 2⁹ = 199844903591 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 (199844904143) 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, 7686342453 + ... + 7686342478.

It is an arithmetic number, because the mean of its divisors is an integer number (53804397262).

Almost surely, 2^199844904103 is an apocalyptic number.

199844904103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

199844904103 is a deficient number, since it is larger than the sum of its proper divisors (15372684945).

199844904103 is a wasteful number, since it uses less digits than its factorization.

199844904103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15372684944.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 199844904103 in words is "one hundred ninety-nine billion, eight hundred forty-four million, nine hundred four thousand, one hundred three".