394138792009 has 8 divisors (see below), whose sum is σ = 396515665728. Its totient is φ = 391762118160.

The previous prime is 394138792001. The next prime is 394138792013. The reversal of 394138792009 is 900297831493.

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

It is a cyclic number.

It is not a de Polignac number, because 394138792009 - 2³ = 394138792001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394138792001) 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, 6408414 + ... + 6469624.

It is an arithmetic number, because the mean of its divisors is an integer number (49564458216).

Almost surely, 2^394138792009 is an apocalyptic number.

It is an amenable number.

394138792009 is a deficient number, since it is larger than the sum of its proper divisors (2376873719).

394138792009 is a wasteful number, since it uses less digits than its factorization.

394138792009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99935.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 394138792009 in words is "three hundred ninety-four billion, one hundred thirty-eight million, seven hundred ninety-two thousand, nine".