478165423 has 4 divisors (see below), whose sum is σ = 498955248. Its totient is φ = 457375600.

The previous prime is 478165361. The next prime is 478165453. The reversal of 478165423 is 324561874.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478165423 is a prime.

It is a Smith number, since the sum of its digits (40) 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 (478165453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10394878 + ... + 10394923.

It is an arithmetic number, because the mean of its divisors is an integer number (124738812).

Almost surely, 2^478165423 is an apocalyptic number.

478165423 is a deficient number, since it is larger than the sum of its proper divisors (20789825).

478165423 is a wasteful number, since it uses less digits than its factorization.

478165423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20789824.

The product of its digits is 161280, while the sum is 40.

The square root of 478165423 is about 21866.9939177748. The cubic root of 478165423 is about 781.9747371609.

The spelling of 478165423 in words is "four hundred seventy-eight million, one hundred sixty-five thousand, four hundred twenty-three".