478335509 has 2 divisors, whose sum is σ = 478335510. Its totient is φ = 478335508.

The previous prime is 478335499. The next prime is 478335551. The reversal of 478335509 is 905533874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 323208484 + 155127025 = 17978^2 + 12455^2 .

It is a cyclic number.

It is not a de Polignac number, because 478335509 - 2²⁰ = 477286933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 478335509.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478332509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239167754 + 239167755.

It is an arithmetic number, because the mean of its divisors is an integer number (239167755).

Almost surely, 2^478335509 is an apocalyptic number.

It is an amenable number.

478335509 is a deficient number, since it is larger than the sum of its proper divisors (1).

478335509 is an equidigital number, since it uses as much as digits as its factorization.

478335509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 44.

The square root of 478335509 is about 21870.8826753746. The cubic root of 478335509 is about 782.0674437027.

The spelling of 478335509 in words is "four hundred seventy-eight million, three hundred thirty-five thousand, five hundred nine".