394617216901 has 4 divisors (see below), whose sum is σ = 394634670400. Its totient is φ = 394599763404.

The previous prime is 394617216899. The next prime is 394617216913. The reversal of 394617216901 is 109612716493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 394617216901 - 2¹ = 394617216899 is a prime.

It is a super-3 number, since 3×394617216901³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394617210901) 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, 8692791 + ... + 8738068.

It is an arithmetic number, because the mean of its divisors is an integer number (98658667600).

Almost surely, 2^394617216901 is an apocalyptic number.

It is an amenable number.

394617216901 is a deficient number, since it is larger than the sum of its proper divisors (17453499).

394617216901 is a wasteful number, since it uses less digits than its factorization.

394617216901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17453498.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 394617216901 in words is "three hundred ninety-four billion, six hundred seventeen million, two hundred sixteen thousand, nine hundred one".