478353809 has 2 divisors, whose sum is σ = 478353810. Its totient is φ = 478353808.

The previous prime is 478353791. The next prime is 478353857. The reversal of 478353809 is 908353874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 477859600 + 494209 = 21860^2 + 703^2 .

It is a cyclic number.

It is not a de Polignac number, because 478353809 - 2¹² = 478349713 is a prime.

It is not a weakly prime, because it can be changed into another prime (478323809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239176904 + 239176905.

It is an arithmetic number, because the mean of its divisors is an integer number (239176905).

Almost surely, 2^478353809 is an apocalyptic number.

It is an amenable number.

478353809 is a deficient number, since it is larger than the sum of its proper divisors (1).

478353809 is an equidigital number, since it uses as much as digits as its factorization.

478353809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 478353809 is about 21871.3010358323. The cubic root of 478353809 is about 782.0774169338.

The spelling of 478353809 in words is "four hundred seventy-eight million, three hundred fifty-three thousand, eight hundred nine".