394222493 has 12 divisors (see below), whose sum is σ = 463131612. Its totient is φ = 334555200.

The previous prime is 394222489. The next prime is 394222519.

394222493 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 357474649 + 36747844 = 18907^2 + 6062^2 .

It is not a de Polignac number, because 394222493 - 2² = 394222489 is a prime.

It is a super-3 number, since 3×394222493³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394222463) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34880 + ... + 44777.

It is an arithmetic number, because the mean of its divisors is an integer number (38594301).

Almost surely, 2^394222493 is an apocalyptic number.

It is an amenable number.

394222493 is a deficient number, since it is larger than the sum of its proper divisors (68909119).

394222493 is a wasteful number, since it uses less digits than its factorization.

394222493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79772 (or 79765 counting only the distinct ones).

The product of its digits is 93312, while the sum is 38.

The square root of 394222493 is about 19855.0369679837. The cubic root of 394222493 is about 733.2416623473.

The spelling of 394222493 in words is "three hundred ninety-four million, two hundred twenty-two thousand, four hundred ninety-three".