989438339 has 2 divisors, whose sum is σ = 989438340. Its totient is φ = 989438338.

The previous prime is 989438323. The next prime is 989438347. The reversal of 989438339 is 933834989.

It is a strong prime.

It is an emirp because it is prime and its reverse (933834989) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 989438339 - 2⁴ = 989438323 is a prime.

It is not a weakly prime, because it can be changed into another prime (989438389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494719169 + 494719170.

It is an arithmetic number, because the mean of its divisors is an integer number (494719170).

Almost surely, 2^989438339 is an apocalyptic number.

989438339 is a deficient number, since it is larger than the sum of its proper divisors (1).

989438339 is an equidigital number, since it uses as much as digits as its factorization.

989438339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 56.

The square root of 989438339 is about 31455.3387996378. The cubic root of 989438339 is about 996.4669787945.

The spelling of 989438339 in words is "nine hundred eighty-nine million, four hundred thirty-eight thousand, three hundred thirty-nine".