478455493 has 2 divisors, whose sum is σ = 478455494. Its totient is φ = 478455492.

The previous prime is 478455487. The next prime is 478455503. The reversal of 478455493 is 394554874.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 473584644 + 4870849 = 21762^2 + 2207^2 .

It is a cyclic number.

It is not a de Polignac number, because 478455493 - 2¹⁷ = 478324421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478455193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239227746 + 239227747.

It is an arithmetic number, because the mean of its divisors is an integer number (239227747).

Almost surely, 2^478455493 is an apocalyptic number.

It is an amenable number.

478455493 is a deficient number, since it is larger than the sum of its proper divisors (1).

478455493 is an equidigital number, since it uses as much as digits as its factorization.

478455493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2419200, while the sum is 49.

The square root of 478455493 is about 21873.6255111035. The cubic root of 478455493 is about 782.1328285868.

The spelling of 478455493 in words is "four hundred seventy-eight million, four hundred fifty-five thousand, four hundred ninety-three".