894638189 has 2 divisors, whose sum is σ = 894638190. Its totient is φ = 894638188.

The previous prime is 894638089. The next prime is 894638191. The reversal of 894638189 is 981836498.

894638189 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., 811281289 + 83356900 = 28483^2 + 9130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-894638189 is a prime.

Together with 894638191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (894638089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 447319094 + 447319095.

It is an arithmetic number, because the mean of its divisors is an integer number (447319095).

Almost surely, 2^894638189 is an apocalyptic number.

It is an amenable number.

894638189 is a deficient number, since it is larger than the sum of its proper divisors (1).

894638189 is an equidigital number, since it uses as much as digits as its factorization.

894638189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2985984, while the sum is 56.

The square root of 894638189 is about 29910.5029880810. The cubic root of 894638189 is about 963.5682416106.

The spelling of 894638189 in words is "eight hundred ninety-four million, six hundred thirty-eight thousand, one hundred eighty-nine".