478933493 has 4 divisors (see below), whose sum is σ = 487970028. Its totient is φ = 469896960.

The previous prime is 478933459. The next prime is 478933517. The reversal of 478933493 is 394339874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 394339874 = 2 ⋅197169937.

It can be written as a sum of positive squares in 2 ways, for example, as 425101924 + 53831569 = 20618^2 + 7337^2 .

It is a cyclic number.

It is not a de Polignac number, because 478933493 - 2¹⁰ = 478932469 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 (478933093) 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, 4518188 + ... + 4518293.

It is an arithmetic number, because the mean of its divisors is an integer number (121992507).

Almost surely, 2^478933493 is an apocalyptic number.

It is an amenable number.

478933493 is a deficient number, since it is larger than the sum of its proper divisors (9036535).

478933493 is an equidigital number, since it uses as much as digits as its factorization.

478933493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9036534.

The product of its digits is 1959552, while the sum is 50.

The square root of 478933493 is about 21884.5491842990. The cubic root of 478933493 is about 782.3932046409.

The spelling of 478933493 in words is "four hundred seventy-eight million, nine hundred thirty-three thousand, four hundred ninety-three".