889909 has 2 divisors, whose sum is σ = 889910. Its totient is φ = 889908.

The previous prime is 889907. The next prime is 889921. The reversal of 889909 is 909988.

889909 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., 770884 + 119025 = 878^2 + 345^2 .

It is a cyclic number.

It is not a de Polignac number, because 889909 - 2¹ = 889907 is a prime.

Together with 889907, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (889901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444954 + 444955.

It is an arithmetic number, because the mean of its divisors is an integer number (444955).

2⁸⁸⁹⁹⁰⁹ is an apocalyptic number.

It is an amenable number.

889909 is a deficient number, since it is larger than the sum of its proper divisors (1).

889909 is an equidigital number, since it uses as much as digits as its factorization.

889909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 43.

The square root of 889909 is about 943.3498820692. The cubic root of 889909 is about 96.1867386627.

The spelling of 889909 in words is "eight hundred eighty-nine thousand, nine hundred nine".