383209 has 4 divisors (see below), whose sum is σ = 393604. Its totient is φ = 372816.

The previous prime is 383179. The next prime is 383219. The reversal of 383209 is 902383.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 902383 = 103 ⋅8761.

It can be written as a sum of positive squares in 2 ways, for example, as 275625 + 107584 = 525^2 + 328^2 .

It is a cyclic number.

It is not a de Polignac number, because 383209 - 2⁷ = 383081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (383219) 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, 5142 + ... + 5215.

It is an arithmetic number, because the mean of its divisors is an integer number (98401).

2³⁸³²⁰⁹ is an apocalyptic number.

It is an amenable number.

383209 is a deficient number, since it is larger than the sum of its proper divisors (10395).

383209 is a wasteful number, since it uses less digits than its factorization.

383209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10394.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 383209 is about 619.0387709990. The cubic root of 383209 is about 72.6348816839.

The spelling of 383209 in words is "three hundred eighty-three thousand, two hundred nine".