478088609 has 2 divisors, whose sum is σ = 478088610. Its totient is φ = 478088608.

The previous prime is 478088563. The next prime is 478088627. The reversal of 478088609 is 906880874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 423742225 + 54346384 = 20585^2 + 7372^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478088609 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 (478088629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239044304 + 239044305.

It is an arithmetic number, because the mean of its divisors is an integer number (239044305).

Almost surely, 2^478088609 is an apocalyptic number.

It is an amenable number.

478088609 is a deficient number, since it is larger than the sum of its proper divisors (1).

478088609 is an equidigital number, since it uses as much as digits as its factorization.

478088609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 50.

The square root of 478088609 is about 21865.2374558339. The cubic root of 478088609 is about 781.9328619567.

The spelling of 478088609 in words is "four hundred seventy-eight million, eighty-eight thousand, six hundred nine".