478729609 has 2 divisors, whose sum is σ = 478729610. Its totient is φ = 478729608.

The previous prime is 478729591. The next prime is 478729631. The reversal of 478729609 is 906927874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 422179209 + 56550400 = 20547^2 + 7520^2 .

It is a cyclic number.

It is not a de Polignac number, because 478729609 - 2²⁵ = 445175177 is a prime.

It is not a weakly prime, because it can be changed into another prime (478729679) 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, 239364804 + 239364805.

It is an arithmetic number, because the mean of its divisors is an integer number (239364805).

Almost surely, 2^478729609 is an apocalyptic number.

It is an amenable number.

478729609 is a deficient number, since it is larger than the sum of its proper divisors (1).

478729609 is an equidigital number, since it uses as much as digits as its factorization.

478729609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The square root of 478729609 is about 21879.8905161795. The cubic root of 478729609 is about 782.2821661915.

The spelling of 478729609 in words is "four hundred seventy-eight million, seven hundred twenty-nine thousand, six hundred nine".