394806205 has 4 divisors (see below), whose sum is σ = 473767452. Its totient is φ = 315844960.

The previous prime is 394806127. The next prime is 394806233. The reversal of 394806205 is 502608493.

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 61889689 + 332916516 = 7867^2 + 18246^2 .

It is not a de Polignac number, because 394806205 - 2¹⁷ = 394675133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39480616 + ... + 39480625.

It is an arithmetic number, because the mean of its divisors is an integer number (118441863).

Almost surely, 2^394806205 is an apocalyptic number.

It is an amenable number.

394806205 is a deficient number, since it is larger than the sum of its proper divisors (78961247).

394806205 is an equidigital number, since it uses as much as digits as its factorization.

394806205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78961246.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 394806205 is about 19869.7308738694. The cubic root of 394806205 is about 733.6033793098.

The spelling of 394806205 in words is "three hundred ninety-four million, eight hundred six thousand, two hundred five".