393983793 has 12 divisors (see below), whose sum is σ = 650386048. Its totient is φ = 225133560.

The previous prime is 393983783. The next prime is 393983797. The reversal of 393983793 is 397389393.

It is a happy number.

It is not a de Polignac number, because 393983793 - 2⁵ = 393983761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (393983797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3126793 + ... + 3126918.

Almost surely, 2^393983793 is an apocalyptic number.

It is an amenable number.

393983793 is a deficient number, since it is larger than the sum of its proper divisors (256402255).

393983793 is a wasteful number, since it uses less digits than its factorization.

393983793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6253724 (or 6253721 counting only the distinct ones).

The product of its digits is 3306744, while the sum is 54.

The square root of 393983793 is about 19849.0249886487. The cubic root of 393983793 is about 733.0936409251.

The spelling of 393983793 in words is "three hundred ninety-three million, nine hundred eighty-three thousand, seven hundred ninety-three".