839223439 has 2 divisors, whose sum is σ = 839223440. Its totient is φ = 839223438.

The previous prime is 839223401. The next prime is 839223467. The reversal of 839223439 is 934322938.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 839223439 - 2¹⁷ = 839092367 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 839223395 and 839223404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (839223499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419611719 + 419611720.

It is an arithmetic number, because the mean of its divisors is an integer number (419611720).

Almost surely, 2^839223439 is an apocalyptic number.

839223439 is a deficient number, since it is larger than the sum of its proper divisors (1).

839223439 is an equidigital number, since it uses as much as digits as its factorization.

839223439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 43.

The square root of 839223439 is about 28969.3534446318. The cubic root of 839223439 is about 943.2479463252.

The spelling of 839223439 in words is "eight hundred thirty-nine million, two hundred twenty-three thousand, four hundred thirty-nine".