394193910071 has 16 divisors (see below), whose sum is σ = 454122000864. Its totient is φ = 338936500224.

The previous prime is 394193910059. The next prime is 394193910083. The reversal of 394193910071 is 170019391493.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (394193910059) and next prime (394193910083).

It is a cyclic number.

It is not a de Polignac number, because 394193910071 - 2¹⁰ = 394193909047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 394193909998 and 394193910025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394193910001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9172805 + ... + 9215678.

It is an arithmetic number, because the mean of its divisors is an integer number (28382625054).

Almost surely, 2^394193910071 is an apocalyptic number.

394193910071 is a deficient number, since it is larger than the sum of its proper divisors (59928090793).

394193910071 is a wasteful number, since it uses less digits than its factorization.

394193910071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18388610.

The product of its (nonzero) digits is 183708, while the sum is 47.

The spelling of 394193910071 in words is "three hundred ninety-four billion, one hundred ninety-three million, nine hundred ten thousand, seventy-one".