189834217 has 2 divisors, whose sum is σ = 189834218. Its totient is φ = 189834216.

The previous prime is 189834209. The next prime is 189834233. The reversal of 189834217 is 712438981.

189834217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146023056 + 43811161 = 12084^2 + 6619^2 .

It is a cyclic number.

It is not a de Polignac number, because 189834217 - 2³ = 189834209 is a prime.

It is not a weakly prime, because it can be changed into another prime (189834017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94917108 + 94917109.

It is an arithmetic number, because the mean of its divisors is an integer number (94917109).

Almost surely, 2^189834217 is an apocalyptic number.

It is an amenable number.

189834217 is a deficient number, since it is larger than the sum of its proper divisors (1).

189834217 is an equidigital number, since it uses as much as digits as its factorization.

189834217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 43.

The square root of 189834217 is about 13778.0338582833. The cubic root of 189834217 is about 574.7224540810.

The spelling of 189834217 in words is "one hundred eighty-nine million, eight hundred thirty-four thousand, two hundred seventeen".