499844789 has 2 divisors, whose sum is σ = 499844790. Its totient is φ = 499844788.

The previous prime is 499844777. The next prime is 499844867. The reversal of 499844789 is 987448994.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 394618225 + 105226564 = 19865^2 + 10258^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499844789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (499849789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249922394 + 249922395.

It is an arithmetic number, because the mean of its divisors is an integer number (249922395).

Almost surely, 2^499844789 is an apocalyptic number.

It is an amenable number.

499844789 is a deficient number, since it is larger than the sum of its proper divisors (1).

499844789 is an equidigital number, since it uses as much as digits as its factorization.

499844789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20901888, while the sum is 62.

The square root of 499844789 is about 22357.2088821481. The cubic root of 499844789 is about 793.6183901164.

The spelling of 499844789 in words is "four hundred ninety-nine million, eight hundred forty-four thousand, seven hundred eighty-nine".