839828989 has 2 divisors, whose sum is σ = 839828990. Its totient is φ = 839828988.

The previous prime is 839828963. The next prime is 839829017. The reversal of 839828989 is 989828938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 527069764 + 312759225 = 22958^2 + 17685^2 .

It is a cyclic number.

It is not a de Polignac number, because 839828989 - 2¹⁹ = 839304701 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 839828989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (839828939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419914494 + 419914495.

It is an arithmetic number, because the mean of its divisors is an integer number (419914495).

Almost surely, 2^839828989 is an apocalyptic number.

It is an amenable number.

839828989 is a deficient number, since it is larger than the sum of its proper divisors (1).

839828989 is an equidigital number, since it uses as much as digits as its factorization.

839828989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17915904, while the sum is 64.

The square root of 839828989 is about 28979.8031221746. The cubic root of 839828989 is about 943.4747617521.

The spelling of 839828989 in words is "eight hundred thirty-nine million, eight hundred twenty-eight thousand, nine hundred eighty-nine".