383993 has 4 divisors (see below), whose sum is σ = 386688. Its totient is φ = 381300.

The previous prime is 383987. The next prime is 384001. The reversal of 383993 is 399383.

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: 399383 = 73 ⋅5471.

It is a cyclic number.

It is not a de Polignac number, because 383993 - 2¹⁶ = 318457 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (383923) 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, 1121 + ... + 1422.

It is an arithmetic number, because the mean of its divisors is an integer number (96672).

2³⁸³⁹⁹³ is an apocalyptic number.

It is an amenable number.

383993 is a deficient number, since it is larger than the sum of its proper divisors (2695).

383993 is a wasteful number, since it uses less digits than its factorization.

383993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2694.

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

The square root of 383993 is about 619.6716872667. The cubic root of 383993 is about 72.6843820493.

The spelling of 383993 in words is "three hundred eighty-three thousand, nine hundred ninety-three".