394657318403 has 4 divisors (see below), whose sum is σ = 394836466008. Its totient is φ = 394478170800.

The previous prime is 394657318399. The next prime is 394657318417. The reversal of 394657318403 is 304813756493.

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

It is a cyclic number.

It is not a de Polignac number, because 394657318403 - 2² = 394657318399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394657318493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89570498 + ... + 89574903.

It is an arithmetic number, because the mean of its divisors is an integer number (98709116502).

Almost surely, 2^394657318403 is an apocalyptic number.

394657318403 is a deficient number, since it is larger than the sum of its proper divisors (179147605).

394657318403 is a wasteful number, since it uses less digits than its factorization.

394657318403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179147604.

The product of its (nonzero) digits is 6531840, while the sum is 53.

The spelling of 394657318403 in words is "three hundred ninety-four billion, six hundred fifty-seven million, three hundred eighteen thousand, four hundred three".