394346643493 has 8 divisors (see below), whose sum is σ = 430382517696. Its totient is φ = 358341799200.

The previous prime is 394346643479. The next prime is 394346643521.

394346643493 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 394346643493 - 2²¹ = 394344546341 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 (394346647493) 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, 7730896 + ... + 7781737.

It is an arithmetic number, because the mean of its divisors is an integer number (53797814712).

Almost surely, 2^394346643493 is an apocalyptic number.

It is an amenable number.

394346643493 is a deficient number, since it is larger than the sum of its proper divisors (36035874203).

394346643493 is a wasteful number, since it uses less digits than its factorization.

394346643493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15514955.

The product of its digits is 60466176, while the sum is 58.

The spelling of 394346643493 in words is "three hundred ninety-four billion, three hundred forty-six million, six hundred forty-three thousand, four hundred ninety-three".