190900205 has 18 divisors (see below), whose sum is σ = 236857194. Its totient is φ = 147702816.

The previous prime is 190900169. The next prime is 190900211. The reversal of 190900205 is 502009091.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 93818596 + 97081609 = 9686^2 + 9853^2 .

It is a de Polignac number, because none of the positive numbers 2^k-190900205 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 1143032 + ... + 1143198.

It is an arithmetic number, because the mean of its divisors is an integer number (13158733).

Almost surely, 2^190900205 is an apocalyptic number.

It is an amenable number.

190900205 is a deficient number, since it is larger than the sum of its proper divisors (45956989).

190900205 is an frugal number, since it uses more digits than its factorization.

190900205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 190900205 is about 13816.6640329712. The cubic root of 190900205 is about 575.7962051108.

Adding to 190900205 its reverse (502009091), we get a palindrome (692909296).

The spelling of 190900205 in words is "one hundred ninety million, nine hundred thousand, two hundred five".