989838089 has 2 divisors, whose sum is σ = 989838090. Its totient is φ = 989838088.

The previous prime is 989838071. The next prime is 989838151. The reversal of 989838089 is 980838989.

It is an a-pointer prime, because the next prime (989838151) can be obtained adding 989838089 to its sum of digits (62).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 730080400 + 259757689 = 27020^2 + 16117^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989838089 is a prime.

It is not a weakly prime, because it can be changed into another prime (989838019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494919044 + 494919045.

It is an arithmetic number, because the mean of its divisors is an integer number (494919045).

Almost surely, 2^989838089 is an apocalyptic number.

It is an amenable number.

989838089 is a deficient number, since it is larger than the sum of its proper divisors (1).

989838089 is an equidigital number, since it uses as much as digits as its factorization.

989838089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8957952, while the sum is 62.

The square root of 989838089 is about 31461.6924052092. The cubic root of 989838089 is about 996.6011572895.

The spelling of 989838089 in words is "nine hundred eighty-nine million, eight hundred thirty-eight thousand, eighty-nine".