394329213 has 6 divisors (see below), whose sum is σ = 569586654. Its totient is φ = 262886136.

The previous prime is 394329209. The next prime is 394329233. The reversal of 394329213 is 312923493.

394329213 is a `hidden beast` number, since 3 + 9 + 432 + 9 + 213 = 666.

It can be written as a sum of positive squares in only one way, i.e., 388365849 + 5963364 = 19707^2 + 2442^2 .

It is not a de Polignac number, because 394329213 - 2² = 394329209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394329233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21907170 + ... + 21907187.

It is an arithmetic number, because the mean of its divisors is an integer number (94931109).

Almost surely, 2^394329213 is an apocalyptic number.

It is an amenable number.

394329213 is a deficient number, since it is larger than the sum of its proper divisors (175257441).

394329213 is a wasteful number, since it uses less digits than its factorization.

394329213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43814363 (or 43814360 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 394329213 is about 19857.7242653835. The cubic root of 394329213 is about 733.3078216791.

The spelling of 394329213 in words is "three hundred ninety-four million, three hundred twenty-nine thousand, two hundred thirteen".