478997 has 4 divisors (see below), whose sum is σ = 480396. Its totient is φ = 477600.

The previous prime is 478991. The next prime is 478999. The reversal of 478997 is 799874.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 799874 = 2 ⋅399937.

It can be written as a sum of positive squares in 2 ways, for example, as 323761 + 155236 = 569^2 + 394^2 .

It is a cyclic number.

It is not a de Polignac number, because 478997 - 2⁸ = 478741 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478991) 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, 203 + ... + 999.

It is an arithmetic number, because the mean of its divisors is an integer number (120099).

2⁴⁷⁸⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

478997 is a deficient number, since it is larger than the sum of its proper divisors (1399).

478997 is an equidigital number, since it uses as much as digits as its factorization.

478997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1398.

The product of its digits is 127008, while the sum is 44.

The square root of 478997 is about 692.0960915942. The cubic root of 478997 is about 78.2427785120.

The spelling of 478997 in words is "four hundred seventy-eight thousand, nine hundred ninety-seven".