478109 has 4 divisors (see below), whose sum is σ = 480960. Its totient is φ = 475260.

The previous prime is 478099. The next prime is 478111. The reversal of 478109 is 901874.

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 a de Polignac number, because none of the positive numbers 2^k-478109 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 478109.

It is not an unprimeable number, because it can be changed into a prime (478129) 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, 1157 + ... + 1514.

It is an arithmetic number, because the mean of its divisors is an integer number (120240).

2⁴⁷⁸¹⁰⁹ is an apocalyptic number.

It is an amenable number.

478109 is a deficient number, since it is larger than the sum of its proper divisors (2851).

478109 is a wasteful number, since it uses less digits than its factorization.

478109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 478109 is about 691.4542645758. The cubic root of 478109 is about 78.1943978561.

The spelling of 478109 in words is "four hundred seventy-eight thousand, one hundred nine".