478417 has 2 divisors, whose sum is σ = 478418. Its totient is φ = 478416.

The previous prime is 478411. The next prime is 478421. The reversal of 478417 is 714874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355216 + 123201 = 596^2 + 351^2 .

It is a cyclic number.

It is not a de Polignac number, because 478417 - 2¹¹ = 476369 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (478411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239208 + 239209.

It is an arithmetic number, because the mean of its divisors is an integer number (239209).

2⁴⁷⁸⁴¹⁷ is an apocalyptic number.

It is an amenable number.

478417 is a deficient number, since it is larger than the sum of its proper divisors (1).

478417 is an equidigital number, since it uses as much as digits as its factorization.

478417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6272, while the sum is 31.

The square root of 478417 is about 691.6769477148. The cubic root of 478417 is about 78.2111853145.

It can be divided in two parts, 47 and 8417, that added together give a square (8464 = 92²).

The spelling of 478417 in words is "four hundred seventy-eight thousand, four hundred seventeen".