1990095185 has 16 divisors (see below), whose sum is σ = 2573000976. Its totient is φ = 1468931328.

The previous prime is 1990095179. The next prime is 1990095203. The reversal of 1990095185 is 5815900991.

It can be written as a sum of positive squares in 8 ways, for example, as 816073489 + 1174021696 = 28567^2 + 34264^2 .

It is a cyclic number.

It is not a de Polignac number, because 1990095185 - 2⁸ = 1990094929 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon 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 15 ways as a sum of consecutive naturals, for example, 168287 + ... + 179723.

It is an arithmetic number, because the mean of its divisors is an integer number (160812561).

Almost surely, 2^1990095185 is an apocalyptic number.

It is an amenable number.

1990095185 is a deficient number, since it is larger than the sum of its proper divisors (582905791).

1990095185 is a wasteful number, since it uses less digits than its factorization.

1990095185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14132.

The product of its (nonzero) digits is 145800, while the sum is 47.

The square root of 1990095185 is about 44610.4829048061. The cubic root of 1990095185 is about 1257.8377261255.

The spelling of 1990095185 in words is "one billion, nine hundred ninety million, ninety-five thousand, one hundred eighty-five".