393933 has 4 divisors (see below), whose sum is σ = 525248. Its totient is φ = 262620.

The previous prime is 393931. The next prime is 393947. The reversal of 393933 is 339393.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 339393 = 3 ⋅113131.

It is not a de Polignac number, because 393933 - 2¹ = 393931 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 393933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65653 + ... + 65658.

It is an arithmetic number, because the mean of its divisors is an integer number (131312).

2³⁹³⁹³³ is an apocalyptic number.

It is an amenable number.

393933 is a deficient number, since it is larger than the sum of its proper divisors (131315).

393933 is a wasteful number, since it uses less digits than its factorization.

393933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131314.

The product of its digits is 6561, while the sum is 30.

The square root of 393933 is about 627.6408208522. The cubic root of 393933 is about 73.3062135716.

It can be divided in two parts, 393 and 933, that added together give a triangular number (1326 = T₅₁).

The spelling of 393933 in words is "three hundred ninety-three thousand, nine hundred thirty-three".