394721349 has 16 divisors (see below), whose sum is σ = 593939520. Its totient is φ = 230975360.

The previous prime is 394721347. The next prime is 394721363. The reversal of 394721349 is 943127493.

It is not a de Polignac number, because 394721349 - 2¹ = 394721347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 394721349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394721347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205272 + ... + 207185.

It is an arithmetic number, because the mean of its divisors is an integer number (37121220).

Almost surely, 2^394721349 is an apocalyptic number.

It is an amenable number.

394721349 is a deficient number, since it is larger than the sum of its proper divisors (199218171).

394721349 is a wasteful number, since it uses less digits than its factorization.

394721349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412500.

The product of its digits is 163296, while the sum is 42.

The square root of 394721349 is about 19867.5954508843. The cubic root of 394721349 is about 733.5508175652.

The spelling of 394721349 in words is "three hundred ninety-four million, seven hundred twenty-one thousand, three hundred forty-nine".