384819109 has 2 divisors, whose sum is σ = 384819110. Its totient is φ = 384819108.

The previous prime is 384819107. The next prime is 384819119. The reversal of 384819109 is 901918483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 380367009 + 4452100 = 19503^2 + 2110^2 .

It is an emirp because it is prime and its reverse (901918483) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 384819109 - 2¹ = 384819107 is a prime.

Together with 384819107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (384819107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192409554 + 192409555.

It is an arithmetic number, because the mean of its divisors is an integer number (192409555).

Almost surely, 2^384819109 is an apocalyptic number.

It is an amenable number.

384819109 is a deficient number, since it is larger than the sum of its proper divisors (1).

384819109 is an equidigital number, since it uses as much as digits as its factorization.

384819109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 384819109 is about 19616.8067992729. The cubic root of 384819109 is about 727.3646825390.

The spelling of 384819109 in words is "three hundred eighty-four million, eight hundred nineteen thousand, one hundred nine".