394819 has 2 divisors, whose sum is σ = 394820. Its totient is φ = 394818.

The previous prime is 394817. The next prime is 394829. The reversal of 394819 is 918493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 394819 - 2¹ = 394817 is a prime.

It is a super-2 number, since 2×394819² = 311764085522, which contains 22 as substring.

Together with 394817, it forms a pair of twin primes.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197409 + 197410.

It is an arithmetic number, because the mean of its divisors is an integer number (197410).

2³⁹⁴⁸¹⁹ is an apocalyptic number.

394819 is a deficient number, since it is larger than the sum of its proper divisors (1).

394819 is an equidigital number, since it uses as much as digits as its factorization.

394819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 394819 is about 628.3462421309. The cubic root of 394819 is about 73.3611304172.

The spelling of 394819 in words is "three hundred ninety-four thousand, eight hundred nineteen".