478677109 has 4 divisors (see below), whose sum is σ = 506834604. Its totient is φ = 450519616.

The previous prime is 478677083. The next prime is 478677113. The reversal of 478677109 is 901776874.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 166978084 + 311699025 = 12922^2 + 17655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478677109 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478677119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14078722 + ... + 14078755.

It is an arithmetic number, because the mean of its divisors is an integer number (126708651).

Almost surely, 2^478677109 is an apocalyptic number.

It is an amenable number.

478677109 is a deficient number, since it is larger than the sum of its proper divisors (28157495).

478677109 is a wasteful number, since it uses less digits than its factorization.

478677109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28157494.

The product of its (nonzero) digits is 592704, while the sum is 49.

The square root of 478677109 is about 21878.6907515052. The cubic root of 478677109 is about 782.2535687575.

The spelling of 478677109 in words is "four hundred seventy-eight million, six hundred seventy-seven thousand, one hundred nine".