384189121 has 4 divisors (see below), whose sum is σ = 384380500. Its totient is φ = 383997744.

The previous prime is 384189089. The next prime is 384189131. The reversal of 384189121 is 121981483.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 294602896 + 89586225 = 17164^2 + 9465^2 .

It is a cyclic number.

It is not a de Polignac number, because 384189121 - 2⁵ = 384189089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384189131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92646 + ... + 96703.

It is an arithmetic number, because the mean of its divisors is an integer number (96095125).

Almost surely, 2^384189121 is an apocalyptic number.

It is an amenable number.

384189121 is a deficient number, since it is larger than the sum of its proper divisors (191379).

384189121 is a wasteful number, since it uses less digits than its factorization.

384189121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191378.

The product of its digits is 13824, while the sum is 37.

The square root of 384189121 is about 19600.7428685752. The cubic root of 384189121 is about 726.9675424321.

The spelling of 384189121 in words is "three hundred eighty-four million, one hundred eighty-nine thousand, one hundred twenty-one".