384738313 has 2 divisors, whose sum is σ = 384738314. Its totient is φ = 384738312.

The previous prime is 384738311. The next prime is 384738323. The reversal of 384738313 is 313837483.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 327175744 + 57562569 = 18088^2 + 7587^2 .

It is an emirp because it is prime and its reverse (313837483) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 384738313 - 2¹ = 384738311 is a prime.

Together with 384738311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (384738311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192369156 + 192369157.

It is an arithmetic number, because the mean of its divisors is an integer number (192369157).

Almost surely, 2^384738313 is an apocalyptic number.

It is an amenable number.

384738313 is a deficient number, since it is larger than the sum of its proper divisors (1).

384738313 is an equidigital number, since it uses as much as digits as its factorization.

384738313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 40.

The square root of 384738313 is about 19614.7473345950. The cubic root of 384738313 is about 727.3137735371.

The spelling of 384738313 in words is "three hundred eighty-four million, seven hundred thirty-eight thousand, three hundred thirteen".