383605 has 8 divisors (see below), whose sum is σ = 487512. Its totient is φ = 288768.

The previous prime is 383587. The next prime is 383609. The reversal of 383605 is 506383.

383605 is nontrivially palindromic in base 4.

It can be written as a sum of positive squares in 4 ways, for example, as 2916 + 380689 = 54^2 + 617^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 383605 - 2⁵ = 383573 is a prime.

It is an Ulam 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 383605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2172 + ... + 2341.

It is an arithmetic number, because the mean of its divisors is an integer number (60939).

2³⁸³⁶⁰⁵ is an apocalyptic number.

It is an amenable number.

383605 is a deficient number, since it is larger than the sum of its proper divisors (103907).

383605 is a wasteful number, since it uses less digits than its factorization.

383605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4535.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 383605 is about 619.3585391355. The cubic root of 383605 is about 72.6598928493.

Adding to 383605 its reverse (506383), we get a palindrome (889988).

The spelling of 383605 in words is "three hundred eighty-three thousand, six hundred five".