394497794493 has 48 divisors (see below), whose sum is σ = 625246801920. Its totient is φ = 237702880800.

The previous prime is 394497794491. The next prime is 394497794501.

394497794493 is a `hidden beast` number, since 3 + 9 + 4 + 49 + 7 + 7 + 94 + 493 = 666.

394497794493 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 394497794493 - 2¹ = 394497794491 is a prime.

It is a super-2 number, since 2×394497794493² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394497794491) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14916880 + ... + 14943302.

It is an arithmetic number, because the mean of its divisors is an integer number (13025975040).

Almost surely, 2^394497794493 is an apocalyptic number.

394497794493 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

394497794493 is a deficient number, since it is larger than the sum of its proper divisors (230749007427).

394497794493 is a wasteful number, since it uses less digits than its factorization.

394497794493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27310 (or 27307 counting only the distinct ones).

The product of its digits is 740710656, while the sum is 72.

The spelling of 394497794493 in words is "three hundred ninety-four billion, four hundred ninety-seven million, seven hundred ninety-four thousand, four hundred ninety-three".