478485389 has 2 divisors, whose sum is σ = 478485390. Its totient is φ = 478485388.

The previous prime is 478485377. The next prime is 478485421. The reversal of 478485389 is 983584874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 458388100 + 20097289 = 21410^2 + 4483^2 .

It is a cyclic number.

It is not a de Polignac number, because 478485389 - 2¹⁶ = 478419853 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478485089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239242694 + 239242695.

It is an arithmetic number, because the mean of its divisors is an integer number (239242695).

Almost surely, 2^478485389 is an apocalyptic number.

It is an amenable number.

478485389 is a deficient number, since it is larger than the sum of its proper divisors (1).

478485389 is an equidigital number, since it uses as much as digits as its factorization.

478485389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7741440, while the sum is 56.

The square root of 478485389 is about 21874.3088805109. The cubic root of 478485389 is about 782.1491186120.

It can be divided in two parts, 478485 and 389, that added together give a palindrome (478874).

The spelling of 478485389 in words is "four hundred seventy-eight million, four hundred eighty-five thousand, three hundred eighty-nine".