478169 has 2 divisors, whose sum is σ = 478170. Its totient is φ = 478168.

The previous prime is 478157. The next prime is 478171. The reversal of 478169 is 961874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 375769 + 102400 = 613^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 478169 - 2⁸ = 477913 is a prime.

It is a super-2 number, since 2×478169² = 457291185122, which contains 22 as substring.

Together with 478171, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (478129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239084 + 239085.

It is an arithmetic number, because the mean of its divisors is an integer number (239085).

2⁴⁷⁸¹⁶⁹ is an apocalyptic number.

It is an amenable number.

478169 is a deficient number, since it is larger than the sum of its proper divisors (1).

478169 is an equidigital number, since it uses as much as digits as its factorization.

478169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 478169 is about 691.4976500322. The cubic root of 478169 is about 78.1976687056.

The spelling of 478169 in words is "four hundred seventy-eight thousand, one hundred sixty-nine".