394271305 has 4 divisors (see below), whose sum is σ = 473125572. Its totient is φ = 315417040.

The previous prime is 394271291. The next prime is 394271309. The reversal of 394271305 is 503172493.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 197233936 + 197037369 = 14044^2 + 14037^2 .

It is not a de Polignac number, because 394271305 - 2¹¹ = 394269257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394271309) 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 in 3 ways as a sum of consecutive naturals, for example, 39427126 + ... + 39427135.

It is an arithmetic number, because the mean of its divisors is an integer number (118281393).

Almost surely, 2^394271305 is an apocalyptic number.

It is an amenable number.

394271305 is a deficient number, since it is larger than the sum of its proper divisors (78854267).

394271305 is an equidigital number, since it uses as much as digits as its factorization.

394271305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78854266.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 394271305 is about 19856.2661394332. The cubic root of 394271305 is about 733.2719240359.

The spelling of 394271305 in words is "three hundred ninety-four million, two hundred seventy-one thousand, three hundred five".