189617 has 2 divisors, whose sum is σ = 189618. Its totient is φ = 189616.

The previous prime is 189613. The next prime is 189619. The reversal of 189617 is 716981.

189617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132496 + 57121 = 364^2 + 239^2 .

It is an emirp because it is prime and its reverse (716981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189617 - 2² = 189613 is a prime.

Together with 189619, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (189613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94808 + 94809.

It is an arithmetic number, because the mean of its divisors is an integer number (94809).

2¹⁸⁹⁶¹⁷ is an apocalyptic number.

It is an amenable number.

189617 is a deficient number, since it is larger than the sum of its proper divisors (1).

189617 is an equidigital number, since it uses as much as digits as its factorization.

189617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 32.

The square root of 189617 is about 435.4503416005. The cubic root of 189617 is about 57.4503162506.

The spelling of 189617 in words is "one hundred eighty-nine thousand, six hundred seventeen".