989868959 has 2 divisors, whose sum is σ = 989868960. Its totient is φ = 989868958.

The previous prime is 989868923. The next prime is 989868989. The reversal of 989868959 is 959868989.

989868959 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989868959 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 989868892 and 989868901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989868989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494934479 + 494934480.

It is an arithmetic number, because the mean of its divisors is an integer number (494934480).

Almost surely, 2^989868959 is an apocalyptic number.

989868959 is a deficient number, since it is larger than the sum of its proper divisors (1).

989868959 is an equidigital number, since it uses as much as digits as its factorization.

989868959 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100776960, while the sum is 71.

The square root of 989868959 is about 31462.1829980057. The cubic root of 989868959 is about 996.6115174882.

The spelling of 989868959 in words is "nine hundred eighty-nine million, eight hundred sixty-eight thousand, nine hundred fifty-nine".