478691879 has 4 divisors (see below), whose sum is σ = 485249376. Its totient is φ = 472134384.

The previous prime is 478691849. The next prime is 478691891. The reversal of 478691879 is 978196874.

478691879 is nontrivially palindromic in base 2.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478691879 is a prime.

It is a super-3 number, since 3×478691879³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478691809) 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, 3278639 + ... + 3278784.

It is an arithmetic number, because the mean of its divisors is an integer number (121312344).

Almost surely, 2^478691879 is an apocalyptic number.

478691879 is a deficient number, since it is larger than the sum of its proper divisors (6557497).

478691879 is an equidigital number, since it uses as much as digits as its factorization.

478691879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6557496.

The product of its digits is 6096384, while the sum is 59.

The square root of 478691879 is about 21879.0282919512. The cubic root of 478691879 is about 782.2616143803.

The spelling of 478691879 in words is "four hundred seventy-eight million, six hundred ninety-one thousand, eight hundred seventy-nine".