478691 has 4 divisors (see below), whose sum is σ = 481632. Its totient is φ = 475752.

The previous prime is 478679. The next prime is 478697. The reversal of 478691 is 196874.

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 478691 - 2⁶ = 478627 is a prime.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (478697) 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, 1211 + ... + 1556.

It is an arithmetic number, because the mean of its divisors is an integer number (120408).

2⁴⁷⁸⁶⁹¹ is an apocalyptic number.

478691 is a deficient number, since it is larger than the sum of its proper divisors (2941).

478691 is a wasteful number, since it uses less digits than its factorization.

478691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2940.

The product of its digits is 12096, while the sum is 35.

The square root of 478691 is about 691.8749887082. The cubic root of 478691 is about 78.2261135570.

The spelling of 478691 in words is "four hundred seventy-eight thousand, six hundred ninety-one".