889041689 has 2 divisors, whose sum is σ = 889041690. Its totient is φ = 889041688.

The previous prime is 889041649. The next prime is 889041691. The reversal of 889041689 is 986140988.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 799928089 + 89113600 = 28283^2 + 9440^2 .

It is a cyclic number.

It is not a de Polignac number, because 889041689 - 2²⁴ = 872264473 is a prime.

Together with 889041691, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 889041689.

It is not a weakly prime, because it can be changed into another prime (889041619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444520844 + 444520845.

It is an arithmetic number, because the mean of its divisors is an integer number (444520845).

Almost surely, 2^889041689 is an apocalyptic number.

It is an amenable number.

889041689 is a deficient number, since it is larger than the sum of its proper divisors (1).

889041689 is an equidigital number, since it uses as much as digits as its factorization.

889041689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 53.

The square root of 889041689 is about 29816.8021256472. The cubic root of 889041689 is about 961.5548043553.

The spelling of 889041689 in words is "eight hundred eighty-nine million, forty-one thousand, six hundred eighty-nine".