394817 has 2 divisors, whose sum is σ = 394818. Its totient is φ = 394816.

The previous prime is 394813. The next prime is 394819. The reversal of 394817 is 718493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355216 + 39601 = 596^2 + 199^2 .

It is an emirp because it is prime and its reverse (718493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394817 - 2² = 394813 is a prime.

Together with 394819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (394811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197408 + 197409.

It is an arithmetic number, because the mean of its divisors is an integer number (197409).

2³⁹⁴⁸¹⁷ is an apocalyptic number.

It is an amenable number.

394817 is a deficient number, since it is larger than the sum of its proper divisors (1).

394817 is an equidigital number, since it uses as much as digits as its factorization.

394817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 394817 is about 628.3446506496. The cubic root of 394817 is about 73.3610065439.

The spelling of 394817 in words is "three hundred ninety-four thousand, eight hundred seventeen".