394879739041 has 4 divisors (see below), whose sum is σ = 395523915412. Its totient is φ = 394235562672.

The previous prime is 394879739039. The next prime is 394879739063. The reversal of 394879739041 is 140937978493.

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

It can be written as a sum of positive squares in 2 ways, for example, as 63799182225 + 331080556816 = 252585^2 + 575396^2 .

It is a cyclic number.

It is not a de Polignac number, because 394879739041 - 2¹ = 394879739039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394879739081) 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 3 ways as a sum of consecutive naturals, for example, 322087266 + ... + 322088491.

It is an arithmetic number, because the mean of its divisors is an integer number (98880978853).

Almost surely, 2^394879739041 is an apocalyptic number.

It is an amenable number.

394879739041 is a deficient number, since it is larger than the sum of its proper divisors (644176371).

394879739041 is an equidigital number, since it uses as much as digits as its factorization.

394879739041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644176370.

The product of its (nonzero) digits is 41150592, while the sum is 64.

The spelling of 394879739041 in words is "three hundred ninety-four billion, eight hundred seventy-nine million, seven hundred thirty-nine thousand, forty-one".