478473689 has 4 divisors (see below), whose sum is σ = 478821540. Its totient is φ = 478125840.

The previous prime is 478473647. The next prime is 478473727. The reversal of 478473689 is 986374874.

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

It can be written as a sum of positive squares in 2 ways, for example, as 271689289 + 206784400 = 16483^2 + 14380^2 .

It is a cyclic number.

It is not a de Polignac number, because 478473689 - 2⁸ = 478473433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478479689) 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, 171854 + ... + 174615.

It is an arithmetic number, because the mean of its divisors is an integer number (119705385).

Almost surely, 2^478473689 is an apocalyptic number.

It is an amenable number.

478473689 is a deficient number, since it is larger than the sum of its proper divisors (347851).

478473689 is a wasteful number, since it uses less digits than its factorization.

478473689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347850.

The product of its digits is 8128512, while the sum is 56.

The square root of 478473689 is about 21874.0414418552. The cubic root of 478473689 is about 782.1427434822.

The spelling of 478473689 in words is "four hundred seventy-eight million, four hundred seventy-three thousand, six hundred eighty-nine".