190190609 has 6 divisors (see below), whose sum is σ = 221242194. Its totient is φ = 163020480.

The previous prime is 190190587. The next prime is 190190617. The reversal of 190190609 is 906091091.

It can be written as a sum of positive squares in only one way, i.e., 176890000 + 13300609 = 13300^2 + 3647^2 .

It is not a de Polignac number, because 190190609 - 2²⁰ = 189142033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (190190629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1940672 + ... + 1940769.

It is an arithmetic number, because the mean of its divisors is an integer number (36873699).

Almost surely, 2^190190609 is an apocalyptic number.

It is an amenable number.

190190609 is a deficient number, since it is larger than the sum of its proper divisors (31051585).

190190609 is an equidigital number, since it uses as much as digits as its factorization.

190190609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3881455 (or 3881448 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 190190609 is about 13790.9611340182. The cubic root of 190190609 is about 575.0818877704.

The spelling of 190190609 in words is "one hundred ninety million, one hundred ninety thousand, six hundred nine".