889897009 has 2 divisors, whose sum is σ = 889897010. Its totient is φ = 889897008.

The previous prime is 889897007. The next prime is 889897039. The reversal of 889897009 is 900798988.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 868598784 + 21298225 = 29472^2 + 4615^2 .

It is a cyclic number.

It is not a de Polignac number, because 889897009 - 2¹ = 889897007 is a prime.

Together with 889897007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (889897003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444948504 + 444948505.

It is an arithmetic number, because the mean of its divisors is an integer number (444948505).

Almost surely, 2^889897009 is an apocalyptic number.

It is an amenable number.

889897009 is a deficient number, since it is larger than the sum of its proper divisors (1).

889897009 is an equidigital number, since it uses as much as digits as its factorization.

889897009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 58.

The square root of 889897009 is about 29831.1415973308. The cubic root of 889897009 is about 961.8630664084.

The spelling of 889897009 in words is "eight hundred eighty-nine million, eight hundred ninety-seven thousand, nine".