499998839 has 2 divisors, whose sum is σ = 499998840. Its totient is φ = 499998838.

The previous prime is 499998833. The next prime is 499998841. The reversal of 499998839 is 938899994.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499998839 is a prime.

It is a Sophie Germain prime.

Together with 499998841, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499998833) 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, 249999419 + 249999420.

It is an arithmetic number, because the mean of its divisors is an integer number (249999420).

Almost surely, 2^499998839 is an apocalyptic number.

499998839 is a deficient number, since it is larger than the sum of its proper divisors (1).

499998839 is an equidigital number, since it uses as much as digits as its factorization.

499998839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45349632, while the sum is 68.

The square root of 499998839 is about 22360.6538142336. The cubic root of 499998839 is about 793.6999116594.

The spelling of 499998839 in words is "four hundred ninety-nine million, nine hundred ninety-eight thousand, eight hundred thirty-nine".