189982027217 has 4 divisors (see below), whose sum is σ = 190204750260. Its totient is φ = 189759304176.

The previous prime is 189982027163. The next prime is 189982027241. The reversal of 189982027217 is 712720289981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 712720289981 = 7 ⋅101817184283.

It can be written as a sum of positive squares in 2 ways, for example, as 101891193616 + 88090833601 = 319204^2 + 296801^2 .

It is a cyclic number.

It is not a de Polignac number, because 189982027217 - 2¹⁴ = 189982010833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189982027117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111360242 + ... + 111361947.

It is an arithmetic number, because the mean of its divisors is an integer number (47551187565).

Almost surely, 2^189982027217 is an apocalyptic number.

It is an amenable number.

189982027217 is a deficient number, since it is larger than the sum of its proper divisors (222723043).

189982027217 is an equidigital number, since it uses as much as digits as its factorization.

189982027217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222723042.

The product of its (nonzero) digits is 2032128, while the sum is 56.

The spelling of 189982027217 in words is "one hundred eighty-nine billion, nine hundred eighty-two million, twenty-seven thousand, two hundred seventeen".