384681949849 has 2 divisors, whose sum is σ = 384681949850. Its totient is φ = 384681949848.

The previous prime is 384681949843. The next prime is 384681949907. The reversal of 384681949849 is 948949186483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218570275225 + 166111674624 = 467515^2 + 407568^2 .

It is a cyclic number.

It is not a de Polignac number, because 384681949849 - 2¹¹ = 384681947801 is a prime.

It is a super-2 number, since 2×384681949849² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (384681949843) 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, 192340974924 + 192340974925.

It is an arithmetic number, because the mean of its divisors is an integer number (192340974925).

Almost surely, 2^384681949849 is an apocalyptic number.

It is an amenable number.

384681949849 is a deficient number, since it is larger than the sum of its proper divisors (1).

384681949849 is an equidigital number, since it uses as much as digits as its factorization.

384681949849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 429981696, while the sum is 73.

The spelling of 384681949849 in words is "three hundred eighty-four billion, six hundred eighty-one million, nine hundred forty-nine thousand, eight hundred forty-nine".