889848989 has 2 divisors, whose sum is σ = 889848990. Its totient is φ = 889848988.

The previous prime is 889848961. The next prime is 889848991. The reversal of 889848989 is 989848988.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 601868089 + 287980900 = 24533^2 + 16970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-889848989 is a prime.

Together with 889848991, 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 (889848919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444924494 + 444924495.

It is an arithmetic number, because the mean of its divisors is an integer number (444924495).

Almost surely, 2^889848989 is an apocalyptic number.

It is an amenable number.

889848989 is a deficient number, since it is larger than the sum of its proper divisors (1).

889848989 is an equidigital number, since it uses as much as digits as its factorization.

889848989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95551488, while the sum is 71.

The square root of 889848989 is about 29830.3367228732. The cubic root of 889848989 is about 961.8457649698.

Subtracting 889848989 from its reverse (989848988), we obtain a palindrome (99999999).

The spelling of 889848989 in words is "eight hundred eighty-nine million, eight hundred forty-eight thousand, nine hundred eighty-nine".