394817493 has 16 divisors (see below), whose sum is σ = 602134016. Its totient is φ = 225419760.

The previous prime is 394817483. The next prime is 394817497. The reversal of 394817493 is 394718493.

It is a happy number.

It is not a de Polignac number, because 394817493 - 2⁶ = 394817429 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 (394817497) 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 15 ways as a sum of consecutive naturals, for example, 19830 + ... + 34392.

It is an arithmetic number, because the mean of its divisors is an integer number (37633376).

Almost surely, 2^394817493 is an apocalyptic number.

It is an amenable number.

394817493 is a deficient number, since it is larger than the sum of its proper divisors (207316523).

394817493 is a wasteful number, since it uses less digits than its factorization.

394817493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15864.

The product of its digits is 653184, while the sum is 48.

The square root of 394817493 is about 19870.0149219874. The cubic root of 394817493 is about 733.6103707872.

The spelling of 394817493 in words is "three hundred ninety-four million, eight hundred seventeen thousand, four hundred ninety-three".