394957493 has 12 divisors (see below), whose sum is σ = 466975692. Its totient is φ = 332982720.

The previous prime is 394957483. The next prime is 394957501. The reversal of 394957493 is 394759493.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25472209 + 369485284 = 5047^2 + 19222^2 .

It is not a de Polignac number, because 394957493 - 2⁴ = 394957477 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 (394957483) 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, 63080 + ... + 69057.

It is an arithmetic number, because the mean of its divisors is an integer number (38914641).

Almost surely, 2^394957493 is an apocalyptic number.

It is an amenable number.

394957493 is a deficient number, since it is larger than the sum of its proper divisors (72018199).

394957493 is a wasteful number, since it uses less digits than its factorization.

394957493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132212 (or 132205 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 53.

The square root of 394957493 is about 19873.5375059399. The cubic root of 394957493 is about 733.6970718719.

The spelling of 394957493 in words is "three hundred ninety-four million, nine hundred fifty-seven thousand, four hundred ninety-three".