384638953 has 2 divisors, whose sum is σ = 384638954. Its totient is φ = 384638952.

The previous prime is 384638951. The next prime is 384638981. The reversal of 384638953 is 359836483.

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., 369677529 + 14961424 = 19227^2 + 3868^2 .

It is an emirp because it is prime and its reverse (359836483) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 384638953 - 2¹ = 384638951 is a prime.

Together with 384638951, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 384638897 and 384638906.

It is not a weakly prime, because it can be changed into another prime (384638951) 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, 192319476 + 192319477.

It is an arithmetic number, because the mean of its divisors is an integer number (192319477).

Almost surely, 2^384638953 is an apocalyptic number.

It is an amenable number.

384638953 is a deficient number, since it is larger than the sum of its proper divisors (1).

384638953 is an equidigital number, since it uses as much as digits as its factorization.

384638953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 49.

The square root of 384638953 is about 19612.2143828788. The cubic root of 384638953 is about 727.2511577140.

The spelling of 384638953 in words is "three hundred eighty-four million, six hundred thirty-eight thousand, nine hundred fifty-three".