839789449 has 2 divisors, whose sum is σ = 839789450. Its totient is φ = 839789448.

The previous prime is 839789387. The next prime is 839789497. The reversal of 839789449 is 944987938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 821854224 + 17935225 = 28668^2 + 4235^2 .

It is a cyclic number.

It is not a de Polignac number, because 839789449 - 2¹⁵ = 839756681 is a prime.

It is not a weakly prime, because it can be changed into another prime (839783449) 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, 419894724 + 419894725.

It is an arithmetic number, because the mean of its divisors is an integer number (419894725).

Almost surely, 2^839789449 is an apocalyptic number.

It is an amenable number.

839789449 is a deficient number, since it is larger than the sum of its proper divisors (1).

839789449 is an equidigital number, since it uses as much as digits as its factorization.

839789449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15676416, while the sum is 61.

The square root of 839789449 is about 28979.1209148932. The cubic root of 839789449 is about 943.4599549371.

The spelling of 839789449 in words is "eight hundred thirty-nine million, seven hundred eighty-nine thousand, four hundred forty-nine".