478676813 has 4 divisors (see below), whose sum is σ = 495182940. Its totient is φ = 462170688.

The previous prime is 478676801. The next prime is 478676819. The reversal of 478676813 is 318676874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318676874 = 2 ⋅159338437.

It can be written as a sum of positive squares in 2 ways, for example, as 254785444 + 223891369 = 15962^2 + 14963^2 .

It is a cyclic number.

It is not a de Polignac number, because 478676813 - 2⁶ = 478676749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478676819) 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, 8253020 + ... + 8253077.

It is an arithmetic number, because the mean of its divisors is an integer number (123795735).

Almost surely, 2^478676813 is an apocalyptic number.

It is an amenable number.

478676813 is a deficient number, since it is larger than the sum of its proper divisors (16506127).

478676813 is a wasteful number, since it uses less digits than its factorization.

478676813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16506126.

The product of its digits is 1354752, while the sum is 50.

The square root of 478676813 is about 21878.6839869312. The cubic root of 478676813 is about 782.2534075166.

The spelling of 478676813 in words is "four hundred seventy-eight million, six hundred seventy-six thousand, eight hundred thirteen".