385439228789 has 2 divisors, whose sum is σ = 385439228790. Its totient is φ = 385439228788.

The previous prime is 385439228747. The next prime is 385439228803. The reversal of 385439228789 is 987822934583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 382752568900 + 2686659889 = 618670^2 + 51833^2 .

It is an emirp because it is prime and its reverse (987822934583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 385439228789 - 2⁸ = 385439228533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385439288789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192719614394 + 192719614395.

It is an arithmetic number, because the mean of its divisors is an integer number (192719614395).

Almost surely, 2^385439228789 is an apocalyptic number.

It is an amenable number.

385439228789 is a deficient number, since it is larger than the sum of its proper divisors (1).

385439228789 is an equidigital number, since it uses as much as digits as its factorization.

385439228789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209018880, while the sum is 68.

The spelling of 385439228789 in words is "three hundred eighty-five billion, four hundred thirty-nine million, two hundred twenty-eight thousand, seven hundred eighty-nine".