478756947 has 4 divisors (see below), whose sum is σ = 638342600. Its totient is φ = 319171296.

The previous prime is 478756939. The next prime is 478756961. The reversal of 478756947 is 749657874.

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

It is not a de Polignac number, because 478756947 - 2³ = 478756939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478751947) 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, 79792822 + ... + 79792827.

It is an arithmetic number, because the mean of its divisors is an integer number (159585650).

Almost surely, 2^478756947 is an apocalyptic number.

478756947 is a deficient number, since it is larger than the sum of its proper divisors (159585653).

478756947 is a wasteful number, since it uses less digits than its factorization.

478756947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159585652.

The product of its digits is 11854080, while the sum is 57.

The square root of 478756947 is about 21880.5152361639. The cubic root of 478756947 is about 782.2970567284.

The spelling of 478756947 in words is "four hundred seventy-eight million, seven hundred fifty-six thousand, nine hundred forty-seven".