989894239 has 2 divisors, whose sum is σ = 989894240. Its totient is φ = 989894238.

The previous prime is 989894237. The next prime is 989894287. The reversal of 989894239 is 932498989.

989894239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 989894239 - 2¹ = 989894237 is a prime.

Together with 989894237, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989894237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494947119 + 494947120.

It is an arithmetic number, because the mean of its divisors is an integer number (494947120).

Almost surely, 2^989894239 is an apocalyptic number.

989894239 is a deficient number, since it is larger than the sum of its proper divisors (1).

989894239 is an equidigital number, since it uses as much as digits as its factorization.

989894239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10077696, while the sum is 61.

The square root of 989894239 is about 31462.5847476014. The cubic root of 989894239 is about 996.6200014815.

The spelling of 989894239 in words is "nine hundred eighty-nine million, eight hundred ninety-four thousand, two hundred thirty-nine".