384936389 has 4 divisors (see below), whose sum is σ = 407579724. Its totient is φ = 362293056.

The previous prime is 384936379. The next prime is 384936407. The reversal of 384936389 is 983639483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 983639483 = 3359 ⋅292837.

It can be written as a sum of positive squares in 2 ways, for example, as 114597025 + 270339364 = 10705^2 + 16442^2 .

It is a cyclic number.

It is not a de Polignac number, because 384936389 - 2¹² = 384932293 is a prime.

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 384936389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384936329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11321642 + ... + 11321675.

It is an arithmetic number, because the mean of its divisors is an integer number (101894931).

Almost surely, 2^384936389 is an apocalyptic number.

It is an amenable number.

384936389 is a deficient number, since it is larger than the sum of its proper divisors (22643335).

384936389 is a wasteful number, since it uses less digits than its factorization.

384936389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22643334.

The product of its digits is 3359232, while the sum is 53.

The square root of 384936389 is about 19619.7958450133. The cubic root of 384936389 is about 727.4385671802.

The spelling of 384936389 in words is "three hundred eighty-four million, nine hundred thirty-six thousand, three hundred eighty-nine".