394401071671 has 8 divisors (see below), whose sum is σ = 396137592000. Its totient is φ = 392665271040.

The previous prime is 394401071621. The next prime is 394401071737. The reversal of 394401071671 is 176170104493.

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

It is a cyclic number.

It is not a de Polignac number, because 394401071671 - 2⁷ = 394401071543 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 (394401071611) 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 7 ways as a sum of consecutive naturals, for example, 933631 + ... + 1288591.

It is an arithmetic number, because the mean of its divisors is an integer number (49517199000).

Almost surely, 2^394401071671 is an apocalyptic number.

394401071671 is a deficient number, since it is larger than the sum of its proper divisors (1736520329).

394401071671 is a wasteful number, since it uses less digits than its factorization.

394401071671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359849.

The product of its (nonzero) digits is 127008, while the sum is 43.

It can be divided in two parts, 39440 and 1071671, that added together give a palindrome (1111111).

The spelling of 394401071671 in words is "three hundred ninety-four billion, four hundred one million, seventy-one thousand, six hundred seventy-one".