383939 has 4 divisors (see below), whose sum is σ = 400656. Its totient is φ = 367224.

The previous prime is 383923. The next prime is 383941. The reversal of 383939 is 939383.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 939383 = 281 ⋅3343.

It is a cyclic number.

It is not a de Polignac number, because 383939 - 2⁴ = 383923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 383899 and 383908.

It is not an unprimeable number, because it can be changed into a prime (383909) 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, 8324 + ... + 8369.

It is an arithmetic number, because the mean of its divisors is an integer number (100164).

2³⁸³⁹³⁹ is an apocalyptic number.

383939 is a deficient number, since it is larger than the sum of its proper divisors (16717).

383939 is a wasteful number, since it uses less digits than its factorization.

383939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16716.

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

The square root of 383939 is about 619.6281142750. The cubic root of 383939 is about 72.6809747471.

The spelling of 383939 in words is "three hundred eighty-three thousand, nine hundred thirty-nine".