385985748989 has 2 divisors, whose sum is σ = 385985748990. Its totient is φ = 385985748988.

The previous prime is 385985748959. The next prime is 385985748997. The reversal of 385985748989 is 989847589583.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 281624446489 + 104361302500 = 530683^2 + 323050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385985748989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385985748959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192992874494 + 192992874495.

It is an arithmetic number, because the mean of its divisors is an integer number (192992874495).

Almost surely, 2^385985748989 is an apocalyptic number.

It is an amenable number.

385985748989 is a deficient number, since it is larger than the sum of its proper divisors (1).

385985748989 is an equidigital number, since it uses as much as digits as its factorization.

385985748989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6270566400, while the sum is 83.

The spelling of 385985748989 in words is "three hundred eighty-five billion, nine hundred eighty-five million, seven hundred forty-eight thousand, nine hundred eighty-nine".