199091103 has 8 divisors (see below), whose sum is σ = 269417088. Its totient is φ = 130746264.

The previous prime is 199091093. The next prime is 199091143. The reversal of 199091103 is 301190991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 199091103 - 2⁵ = 199091071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199091143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495051 + ... + 495452.

It is an arithmetic number, because the mean of its divisors is an integer number (33677136).

Almost surely, 2^199091103 is an apocalyptic number.

199091103 is a deficient number, since it is larger than the sum of its proper divisors (70325985).

199091103 is an equidigital number, since it uses as much as digits as its factorization.

199091103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 990573.

The product of its (nonzero) digits is 2187, while the sum is 33.

The square root of 199091103 is about 14109.9646704023. The cubic root of 199091103 is about 583.9163253093.

It can be divided in two parts, 19909 and 1103, that added together give a palindrome (21012).

The spelling of 199091103 in words is "one hundred ninety-nine million, ninety-one thousand, one hundred three".