199110901 has 4 divisors (see below), whose sum is σ = 217211904. Its totient is φ = 181009900.

The previous prime is 199110887. The next prime is 199110913. The reversal of 199110901 is 109011991.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 109011991 = 11 ⋅9910181.

It is a cyclic number.

It is not a de Polignac number, because 199110901 - 2⁵ = 199110869 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199110991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9050485 + ... + 9050506.

It is an arithmetic number, because the mean of its divisors is an integer number (54302976).

Almost surely, 2^199110901 is an apocalyptic number.

199110901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

199110901 is a deficient number, since it is larger than the sum of its proper divisors (18101003).

199110901 is a wasteful number, since it uses less digits than its factorization.

199110901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18101002.

The product of its (nonzero) digits is 729, while the sum is 31.

The square root of 199110901 is about 14110.6662138965. Note that the first 3 decimals coincide. The cubic root of 199110901 is about 583.9356799197.

The spelling of 199110901 in words is "one hundred ninety-nine million, one hundred ten thousand, nine hundred one".