478632917 has 4 divisors (see below), whose sum is σ = 547009056. Its totient is φ = 410256780.

The previous prime is 478632899. The next prime is 478632919. The reversal of 478632917 is 719236874.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 478632917 - 2¹⁰ = 478631893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478632919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34188059 + ... + 34188072.

It is an arithmetic number, because the mean of its divisors is an integer number (136752264).

Almost surely, 2^478632917 is an apocalyptic number.

It is an amenable number.

478632917 is a deficient number, since it is larger than the sum of its proper divisors (68376139).

478632917 is an equidigital number, since it uses as much as digits as its factorization.

478632917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68376138.

The product of its digits is 508032, while the sum is 47.

The square root of 478632917 is about 21877.6807957334. The cubic root of 478632917 is about 782.2294951785.

The spelling of 478632917 in words is "four hundred seventy-eight million, six hundred thirty-two thousand, nine hundred seventeen".