393983 has 4 divisors (see below), whose sum is σ = 395280. Its totient is φ = 392688.

The previous prime is 393977. The next prime is 393989. The reversal of 393983 is 389393.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 389393 = 439 ⋅887.

It is an interprime number because it is at equal distance from previous prime (393977) and next prime (393989).

It is a cyclic number.

It is not a de Polignac number, because 393983 - 2⁶ = 393919 is a prime.

It is a Duffinian number.

It is a plaindrome in base 6 and base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83 + ... + 891.

It is an arithmetic number, because the mean of its divisors is an integer number (98820).

2³⁹³⁹⁸³ is an apocalyptic number.

393983 is a deficient number, since it is larger than the sum of its proper divisors (1297).

393983 is an equidigital number, since it uses as much as digits as its factorization.

393983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296.

The product of its digits is 17496, while the sum is 35.

The square root of 393983 is about 627.6806512869. The cubic root of 393983 is about 73.3093149074.

The spelling of 393983 in words is "three hundred ninety-three thousand, nine hundred eighty-three".