478578689 has 2 divisors, whose sum is σ = 478578690. Its totient is φ = 478578688.

The previous prime is 478578673. The next prime is 478578731. The reversal of 478578689 is 986875874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 393625600 + 84953089 = 19840^2 + 9217^2 .

It is a cyclic number.

It is not a de Polignac number, because 478578689 - 2⁴ = 478578673 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (478578629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239289344 + 239289345.

It is an arithmetic number, because the mean of its divisors is an integer number (239289345).

Almost surely, 2^478578689 is an apocalyptic number.

It is an amenable number.

478578689 is a deficient number, since it is larger than the sum of its proper divisors (1).

478578689 is an equidigital number, since it uses as much as digits as its factorization.

478578689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27095040, while the sum is 62.

The square root of 478578689 is about 21876.4414153674. The cubic root of 478578689 is about 782.1999524666.

The spelling of 478578689 in words is "four hundred seventy-eight million, five hundred seventy-eight thousand, six hundred eighty-nine".