478239219109 has 2 divisors, whose sum is σ = 478239219110. Its totient is φ = 478239219108.

The previous prime is 478239219103. The next prime is 478239219151. The reversal of 478239219109 is 901912932874.

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., 446787970084 + 31451249025 = 668422^2 + 177345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478239219109 is a prime.

It is a super-3 number, since 3×478239219109³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 478239219109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478239219103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239119609554 + 239119609555.

It is an arithmetic number, because the mean of its divisors is an integer number (239119609555).

Almost surely, 2^478239219109 is an apocalyptic number.

It is an amenable number.

478239219109 is a deficient number, since it is larger than the sum of its proper divisors (1).

478239219109 is an equidigital number, since it uses as much as digits as its factorization.

478239219109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 478239219109 in words is "four hundred seventy-eight billion, two hundred thirty-nine million, two hundred nineteen thousand, one hundred nine".