2086191873 has 18 divisors (see below), whose sum is σ = 3201077334. Its totient is φ = 1308981504.

The previous prime is 2086191871. The next prime is 2086191893. The reversal of 2086191873 is 3781916802.

2086191873 is a `hidden beast` number, since 20 + 8 + 619 + 1 + 8 + 7 + 3 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 1486333809 + 599858064 = 38553^2 + 24492^2 .

It is not a de Polignac number, because 2086191873 - 2¹ = 2086191871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2086191871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 398436 + ... + 403637.

Almost surely, 2^2086191873 is an apocalyptic number.

It is an amenable number.

2086191873 is a deficient number, since it is larger than the sum of its proper divisors (1114885461).

2086191873 is a wasteful number, since it uses less digits than its factorization.

2086191873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802113 (or 802093 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 2086191873 is about 45674.8494578800. The cubic root of 2086191873 is about 1277.7662606025.

The spelling of 2086191873 in words is "two billion, eighty-six million, one hundred ninety-one thousand, eight hundred seventy-three".