478665539 has 8 divisors (see below), whose sum is σ = 522796032. Its totient is φ = 434637640.

The previous prime is 478665521. The next prime is 478665547. The reversal of 478665539 is 935566874.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478665539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (478665739) 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, 15719 + ... + 34704.

It is an arithmetic number, because the mean of its divisors is an integer number (65349504).

Almost surely, 2^478665539 is an apocalyptic number.

478665539 is a deficient number, since it is larger than the sum of its proper divisors (44130493).

478665539 is a wasteful number, since it uses less digits than its factorization.

478665539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51297.

The product of its digits is 5443200, while the sum is 53.

The square root of 478665539 is about 21878.4263373763. The cubic root of 478665539 is about 782.2472661466.

The spelling of 478665539 in words is "four hundred seventy-eight million, six hundred sixty-five thousand, five hundred thirty-nine".