478143517 has 8 divisors (see below), whose sum is σ = 494387712. Its totient is φ = 462117600.

The previous prime is 478143509. The next prime is 478143521. The reversal of 478143517 is 715341874.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 478143517 - 2³ = 478143509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 478143517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478143577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50109 + ... + 58882.

It is an arithmetic number, because the mean of its divisors is an integer number (61798464).

Almost surely, 2^478143517 is an apocalyptic number.

It is an amenable number.

478143517 is a deficient number, since it is larger than the sum of its proper divisors (16244195).

478143517 is a wasteful number, since it uses less digits than its factorization.

478143517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109139.

The product of its digits is 94080, while the sum is 40.

The square root of 478143517 is about 21866.4930201439. The cubic root of 478143517 is about 781.9627955473.

The spelling of 478143517 in words is "four hundred seventy-eight million, one hundred forty-three thousand, five hundred seventeen".