478139759 has 4 divisors (see below), whose sum is σ = 478508016. Its totient is φ = 477771504.

The previous prime is 478139749. The next prime is 478139803. The reversal of 478139759 is 957931874.

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

It is a cyclic number.

It is not a de Polignac number, because 478139759 - 2¹² = 478135663 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 478139759.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478139719) 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, 182174 + ... + 184779.

It is an arithmetic number, because the mean of its divisors is an integer number (119627004).

Almost surely, 2^478139759 is an apocalyptic number.

478139759 is a deficient number, since it is larger than the sum of its proper divisors (368257).

478139759 is a wasteful number, since it uses less digits than its factorization.

478139759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368256.

The product of its digits is 1905120, while the sum is 53.

The square root of 478139759 is about 21866.4070894146. The cubic root of 478139759 is about 781.9607469128.

The spelling of 478139759 in words is "four hundred seventy-eight million, one hundred thirty-nine thousand, seven hundred fifty-nine".