383830921 has 8 divisors (see below), whose sum is σ = 397341000. Its totient is φ = 370339200.

The previous prime is 383830907. The next prime is 383830939. The reversal of 383830921 is 129038383.

It can be written as a sum of positive squares in 4 ways, for example, as 32080896 + 351750025 = 5664^2 + 18755^2 .

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 383830921 - 2⁹ = 383830409 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (383830121) 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, 48555 + ... + 55903.

It is an arithmetic number, because the mean of its divisors is an integer number (49667625).

Almost surely, 2^383830921 is an apocalyptic number.

It is an amenable number.

383830921 is a deficient number, since it is larger than the sum of its proper divisors (13510079).

383830921 is a wasteful number, since it uses less digits than its factorization.

383830921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9179.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 383830921 is about 19591.6033289774. The cubic root of 383830921 is about 726.7415419812.

The spelling of 383830921 in words is "three hundred eighty-three million, eight hundred thirty thousand, nine hundred twenty-one".