385645913 has 2 divisors, whose sum is σ = 385645914. Its totient is φ = 385645912.

The previous prime is 385645879. The next prime is 385645961. The reversal of 385645913 is 319546583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 384669769 + 976144 = 19613^2 + 988^2 .

It is an emirp because it is prime and its reverse (319546583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 385645913 - 2⁶ = 385645849 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (385645963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192822956 + 192822957.

It is an arithmetic number, because the mean of its divisors is an integer number (192822957).

Almost surely, 2^385645913 is an apocalyptic number.

It is an amenable number.

385645913 is a deficient number, since it is larger than the sum of its proper divisors (1).

385645913 is an equidigital number, since it uses as much as digits as its factorization.

385645913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 44.

The square root of 385645913 is about 19637.8693599891. The cubic root of 385645913 is about 727.8852369361.

The spelling of 385645913 in words is "three hundred eighty-five million, six hundred forty-five thousand, nine hundred thirteen".