394098221 has 16 divisors (see below), whose sum is σ = 439595520. Its totient is φ = 350293680.

The previous prime is 394098217. The next prime is 394098253. The reversal of 394098221 is 122890493.

It is not a de Polignac number, because 394098221 - 2² = 394098217 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 (394098281) 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 15 ways as a sum of consecutive naturals, for example, 100520 + ... + 104366.

It is an arithmetic number, because the mean of its divisors is an integer number (27474720).

Almost surely, 2^394098221 is an apocalyptic number.

It is an amenable number.

394098221 is a deficient number, since it is larger than the sum of its proper divisors (45497299).

394098221 is a wasteful number, since it uses less digits than its factorization.

394098221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4064.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 394098221 is about 19851.9072383487. The cubic root of 394098221 is about 733.1646068892.

The spelling of 394098221 in words is "three hundred ninety-four million, ninety-eight thousand, two hundred twenty-one".