394541279999 has 4 divisors (see below), whose sum is σ = 394548162720. Its totient is φ = 394534397280.

The previous prime is 394541279971. The next prime is 394541280011. The reversal of 394541279999 is 999972145493.

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

It is a cyclic number.

It is not a de Polignac number, because 394541279999 - 2¹² = 394541275903 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 (394541272999) 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, 3354647 + ... + 3470264.

It is an arithmetic number, because the mean of its divisors is an integer number (98637040680).

Almost surely, 2^394541279999 is an apocalyptic number.

394541279999 is a deficient number, since it is larger than the sum of its proper divisors (6882721).

394541279999 is an equidigital number, since it uses as much as digits as its factorization.

394541279999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6882720.

The product of its digits is 198404640, while the sum is 71.

The spelling of 394541279999 in words is "three hundred ninety-four billion, five hundred forty-one million, two hundred seventy-nine thousand, nine hundred ninety-nine".