839478361 has 2 divisors, whose sum is σ = 839478362. Its totient is φ = 839478360.

The previous prime is 839478359. The next prime is 839478391. The reversal of 839478361 is 163874938.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 710542336 + 128936025 = 26656^2 + 11355^2 .

It is a cyclic number.

It is not a de Polignac number, because 839478361 - 2¹ = 839478359 is a prime.

Together with 839478359, 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 (839478331) 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, 419739180 + 419739181.

It is an arithmetic number, because the mean of its divisors is an integer number (419739181).

Almost surely, 2^839478361 is an apocalyptic number.

It is an amenable number.

839478361 is a deficient number, since it is larger than the sum of its proper divisors (1).

839478361 is an equidigital number, since it uses as much as digits as its factorization.

839478361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 49.

The square root of 839478361 is about 28973.7529671253. The cubic root of 839478361 is about 943.3434434634.

The spelling of 839478361 in words is "eight hundred thirty-nine million, four hundred seventy-eight thousand, three hundred sixty-one".