839446889 has 2 divisors, whose sum is σ = 839446890. Its totient is φ = 839446888.

The previous prime is 839446877. The next prime is 839446891. The reversal of 839446889 is 988644938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 672520489 + 166926400 = 25933^2 + 12920^2 .

It is a cyclic number.

It is not a de Polignac number, because 839446889 - 2⁴ = 839446873 is a prime.

Together with 839446891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (839445889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419723444 + 419723445.

It is an arithmetic number, because the mean of its divisors is an integer number (419723445).

Almost surely, 2^839446889 is an apocalyptic number.

It is an amenable number.

839446889 is a deficient number, since it is larger than the sum of its proper divisors (1).

839446889 is an equidigital number, since it uses as much as digits as its factorization.

839446889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11943936, while the sum is 59.

The square root of 839446889 is about 28973.2098497905. The cubic root of 839446889 is about 943.3316546840.

The spelling of 839446889 in words is "eight hundred thirty-nine million, four hundred forty-six thousand, eight hundred eighty-nine".