478403909 has 2 divisors, whose sum is σ = 478403910. Its totient is φ = 478403908.

The previous prime is 478403843. The next prime is 478403941. The reversal of 478403909 is 909304874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 336722500 + 141681409 = 18350^2 + 11903^2 .

It is a cyclic number.

It is not a de Polignac number, because 478403909 - 2¹⁶ = 478338373 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 478403909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478403999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239201954 + 239201955.

It is an arithmetic number, because the mean of its divisors is an integer number (239201955).

Almost surely, 2^478403909 is an apocalyptic number.

It is an amenable number.

478403909 is a deficient number, since it is larger than the sum of its proper divisors (1).

478403909 is an equidigital number, since it uses as much as digits as its factorization.

478403909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 478403909 is about 21872.4463423733. The cubic root of 478403909 is about 782.1047193963.

The spelling of 478403909 in words is "four hundred seventy-eight million, four hundred three thousand, nine hundred nine".