478557439 has 2 divisors, whose sum is σ = 478557440. Its totient is φ = 478557438.

The previous prime is 478557421. The next prime is 478557473. The reversal of 478557439 is 934755874.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 478557439 - 2⁷ = 478557311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478557419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239278719 + 239278720.

It is an arithmetic number, because the mean of its divisors is an integer number (239278720).

Almost surely, 2^478557439 is an apocalyptic number.

478557439 is a deficient number, since it is larger than the sum of its proper divisors (1).

478557439 is an equidigital number, since it uses as much as digits as its factorization.

478557439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4233600, while the sum is 52.

The square root of 478557439 is about 21875.9557276934. The cubic root of 478557439 is about 782.1883751333.

The spelling of 478557439 in words is "four hundred seventy-eight million, five hundred fifty-seven thousand, four hundred thirty-nine".