190000109 has 24 divisors (see below), whose sum is σ = 223293672. Its totient is φ = 160942080.

The previous prime is 190000103. The next prime is 190000169. The reversal of 190000109 is 901000091.

It can be written as a sum of positive squares in 12 ways, for example, as 108097609 + 81902500 = 10397^2 + 9050^2 .

It is not a de Polignac number, because 190000109 - 2⁸ = 189999853 is a prime.

It is a super-2 number, since 2×190000109² = 72200082840023762, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190000103) 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 23 ways as a sum of consecutive naturals, for example, 116987 + ... + 118599.

It is an arithmetic number, because the mean of its divisors is an integer number (9303903).

Almost surely, 2^190000109 is an apocalyptic number.

It is an amenable number.

190000109 is a deficient number, since it is larger than the sum of its proper divisors (33293563).

190000109 is a wasteful number, since it uses less digits than its factorization.

190000109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697 (or 1684 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 190000109 is about 13784.0527059352. The cubic root of 190000109 is about 574.8898178295.

The spelling of 190000109 in words is "one hundred ninety million, one hundred nine", and thus it is an aban number.