190555989 has 16 divisors (see below), whose sum is σ = 285516672. Its totient is φ = 112166208.

The previous prime is 190555961. The next prime is 190556011. The reversal of 190555989 is 989555091.

It is a happy number.

It is not a de Polignac number, because 190555989 - 2¹⁶ = 190490453 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190555949) 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 15 ways as a sum of consecutive naturals, for example, 105322 + ... + 107115.

It is an arithmetic number, because the mean of its divisors is an integer number (17844792).

Almost surely, 2^190555989 is an apocalyptic number.

It is an amenable number.

190555989 is a deficient number, since it is larger than the sum of its proper divisors (94960683).

190555989 is a wasteful number, since it uses less digits than its factorization.

190555989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212476.

The product of its (nonzero) digits is 729000, while the sum is 51.

The square root of 190555989 is about 13804.2018603033. The cubic root of 190555989 is about 575.4499203227.

The spelling of 190555989 in words is "one hundred ninety million, five hundred fifty-five thousand, nine hundred eighty-nine".