384639169 has 2 divisors, whose sum is σ = 384639170. Its totient is φ = 384639168.

The previous prime is 384639149. The next prime is 384639193. The reversal of 384639169 is 961936483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275958544 + 108680625 = 16612^2 + 10425^2 .

It is a cyclic number.

It is not a de Polignac number, because 384639169 - 2⁵ = 384639137 is a prime.

It is a super-2 number, since 2×384639169² = 295894580658021122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (384639119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192319584 + 192319585.

It is an arithmetic number, because the mean of its divisors is an integer number (192319585).

Almost surely, 2^384639169 is an apocalyptic number.

It is an amenable number.

384639169 is a deficient number, since it is larger than the sum of its proper divisors (1).

384639169 is an equidigital number, since it uses as much as digits as its factorization.

384639169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 49.

The square root of 384639169 is about 19612.2198896504. The cubic root of 384639169 is about 727.2512938470.

The spelling of 384639169 in words is "three hundred eighty-four million, six hundred thirty-nine thousand, one hundred sixty-nine".