394831384617 has 4 divisors (see below), whose sum is σ = 526441846160. Its totient is φ = 263220923076.

The previous prime is 394831384613. The next prime is 394831384637. The reversal of 394831384617 is 716483138493.

394831384617 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 394831384617 - 2² = 394831384613 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394831384613) 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, 65805230767 + ... + 65805230772.

It is an arithmetic number, because the mean of its divisors is an integer number (131610461540).

Almost surely, 2^394831384617 is an apocalyptic number.

It is an amenable number.

394831384617 is a deficient number, since it is larger than the sum of its proper divisors (131610461543).

394831384617 is a wasteful number, since it uses less digits than its factorization.

394831384617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131610461542.

The product of its digits is 10450944, while the sum is 57.

The spelling of 394831384617 in words is "three hundred ninety-four billion, eight hundred thirty-one million, three hundred eighty-four thousand, six hundred seventeen".