394966919 has 2 divisors, whose sum is σ = 394966920. Its totient is φ = 394966918.

The previous prime is 394966909. The next prime is 394966931. The reversal of 394966919 is 919669493.

It is a weak prime.

It is an emirp because it is prime and its reverse (919669493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394966919 - 2⁴ = 394966903 is a prime.

It is a super-2 number, since 2×394966919² = 311997734208705122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394966909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197483459 + 197483460.

It is an arithmetic number, because the mean of its divisors is an integer number (197483460).

Almost surely, 2^394966919 is an apocalyptic number.

394966919 is a deficient number, since it is larger than the sum of its proper divisors (1).

394966919 is an equidigital number, since it uses as much as digits as its factorization.

394966919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2834352, while the sum is 56.

The square root of 394966919 is about 19873.7746540510. The cubic root of 394966919 is about 733.7029085959.

The spelling of 394966919 in words is "three hundred ninety-four million, nine hundred sixty-six thousand, nine hundred nineteen".