394439683 has 4 divisors (see below), whose sum is σ = 430297848. Its totient is φ = 358581520.

The previous prime is 394439681. The next prime is 394439693. The reversal of 394439683 is 386934493.

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

It is not a de Polignac number, because 394439683 - 2¹ = 394439681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394439681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17929066 + ... + 17929087.

It is an arithmetic number, because the mean of its divisors is an integer number (107574462).

Almost surely, 2^394439683 is an apocalyptic number.

394439683 is a deficient number, since it is larger than the sum of its proper divisors (35858165).

394439683 is a wasteful number, since it uses less digits than its factorization.

394439683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35858164.

The product of its digits is 1679616, while the sum is 49.

The square root of 394439683 is about 19860.5056078641. The cubic root of 394439683 is about 733.3762931904.

The spelling of 394439683 in words is "three hundred ninety-four million, four hundred thirty-nine thousand, six hundred eighty-three".