394747 has 2 divisors, whose sum is σ = 394748. Its totient is φ = 394746.

The previous prime is 394739. The next prime is 394759. The reversal of 394747 is 747493.

It is a weak prime.

It is an emirp because it is prime and its reverse (747493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394747 - 2³ = 394739 is a prime.

It is not a weakly prime, because it can be changed into another prime (394717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197373 + 197374.

It is an arithmetic number, because the mean of its divisors is an integer number (197374).

2³⁹⁴⁷⁴⁷ is an apocalyptic number.

394747 is a deficient number, since it is larger than the sum of its proper divisors (1).

394747 is an equidigital number, since it uses as much as digits as its factorization.

394747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 34.

The square root of 394747 is about 628.2889462660. The cubic root of 394747 is about 73.3566707175.

The spelling of 394747 in words is "three hundred ninety-four thousand, seven hundred forty-seven".