394312774679 has 4 divisors (see below), whose sum is σ = 394314278280. Its totient is φ = 394311271080.

The previous prime is 394312774673. The next prime is 394312774697. The reversal of 394312774679 is 976477213493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 976477213493 = 59119 ⋅16517147.

It is a cyclic number.

It is not a de Polignac number, because 394312774679 - 2¹⁶ = 394312709143 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 (394312774673) 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, 244184 + ... + 921005.

It is an arithmetic number, because the mean of its divisors is an integer number (98578569570).

Almost surely, 2^394312774679 is an apocalyptic number.

394312774679 is a deficient number, since it is larger than the sum of its proper divisors (1503601).

394312774679 is a wasteful number, since it uses less digits than its factorization.

394312774679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503600.

The product of its digits is 48009024, while the sum is 62.

The spelling of 394312774679 in words is "three hundred ninety-four billion, three hundred twelve million, seven hundred seventy-four thousand, six hundred seventy-nine".