394335968231 has 8 divisors (see below), whose sum is σ = 411496397664. Its totient is φ = 377176821120.

The previous prime is 394335968207. The next prime is 394335968321. The reversal of 394335968231 is 132869533493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394335968231 is a prime.

It is a super-2 number, since 2×394335968231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394335968731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336515 + ... + 949691.

It is an arithmetic number, because the mean of its divisors is an integer number (51437049708).

Almost surely, 2^394335968231 is an apocalyptic number.

394335968231 is a deficient number, since it is larger than the sum of its proper divisors (17160429433).

394335968231 is a wasteful number, since it uses less digits than its factorization.

394335968231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641161.

The product of its digits is 12597120, while the sum is 56.

The spelling of 394335968231 in words is "three hundred ninety-four billion, three hundred thirty-five million, nine hundred sixty-eight thousand, two hundred thirty-one".