394027916691 has 8 divisors (see below), whose sum is σ = 525396256704. Its totient is φ = 262672427240.

The previous prime is 394027916677. The next prime is 394027916741. The reversal of 394027916691 is 196619720493.

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 394027916691 - 2⁹ = 394027916179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (394027916641) 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, 3140865 + ... + 3263906.

It is an arithmetic number, because the mean of its divisors is an integer number (65674532088).

Almost surely, 2^394027916691 is an apocalyptic number.

394027916691 is a deficient number, since it is larger than the sum of its proper divisors (131368340013).

394027916691 is a wasteful number, since it uses less digits than its factorization.

394027916691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6425281.

The product of its (nonzero) digits is 4408992, while the sum is 57.

The spelling of 394027916691 in words is "three hundred ninety-four billion, twenty-seven million, nine hundred sixteen thousand, six hundred ninety-one".