383655321 has 12 divisors (see below), whose sum is σ = 633335872. Its totient is φ = 219231576.

The previous prime is 383655319. The next prime is 383655323. The reversal of 383655321 is 123556383.

383655321 is a `hidden beast` number, since 3 + 83 + 6 + 553 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (383655319) and next prime (383655323).

It is not a de Polignac number, because 383655321 - 2¹ = 383655319 is a prime.

It is a super-3 number, since 3×383655321³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (383655323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3044821 + ... + 3044946.

Almost surely, 2^383655321 is an apocalyptic number.

It is an amenable number.

383655321 is a deficient number, since it is larger than the sum of its proper divisors (249680551).

383655321 is a wasteful number, since it uses less digits than its factorization.

383655321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6089780 (or 6089777 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 383655321 is about 19587.1213045715. The cubic root of 383655321 is about 726.6306986611.

The spelling of 383655321 in words is "three hundred eighty-three million, six hundred fifty-five thousand, three hundred twenty-one".