478945409 has 2 divisors, whose sum is σ = 478945410. Its totient is φ = 478945408.

The previous prime is 478945373. The next prime is 478945417. The reversal of 478945409 is 904549874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 351187600 + 127757809 = 18740^2 + 11303^2 .

It is a cyclic number.

It is not a de Polignac number, because 478945409 - 2¹⁶ = 478879873 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 (478945609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239472704 + 239472705.

It is an arithmetic number, because the mean of its divisors is an integer number (239472705).

Almost surely, 2^478945409 is an apocalyptic number.

It is an amenable number.

478945409 is a deficient number, since it is larger than the sum of its proper divisors (1).

478945409 is an equidigital number, since it uses as much as digits as its factorization.

478945409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 478945409 is about 21884.8214294748. The cubic root of 478945409 is about 782.3996933080.

The spelling of 478945409 in words is "four hundred seventy-eight million, nine hundred forty-five thousand, four hundred nine".