394504091071 has 4 divisors (see below), whose sum is σ = 394534513672. Its totient is φ = 394473668472.

The previous prime is 394504091053. The next prime is 394504091089. The reversal of 394504091071 is 170190405493.

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

It is an interprime number because it is at equal distance from previous prime (394504091053) and next prime (394504091089).

It is a cyclic number.

It is not a de Polignac number, because 394504091071 - 2¹³ = 394504082879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394504091021) 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, 15191841 + ... + 15217786.

It is an arithmetic number, because the mean of its divisors is an integer number (98633628418).

Almost surely, 2^394504091071 is an apocalyptic number.

394504091071 is a deficient number, since it is larger than the sum of its proper divisors (30422601).

394504091071 is a wasteful number, since it uses less digits than its factorization.

394504091071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30422600.

The product of its (nonzero) digits is 136080, while the sum is 43.

The spelling of 394504091071 in words is "three hundred ninety-four billion, five hundred four million, ninety-one thousand, seventy-one".