384665623 has 4 divisors (see below), whose sum is σ = 384706800. Its totient is φ = 384624448.

The previous prime is 384665609. The next prime is 384665683. The reversal of 384665623 is 326566483.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 326566483 = 311 ⋅1050053.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-384665623 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 384665623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384665683) 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, 903 + ... + 27751.

It is an arithmetic number, because the mean of its divisors is an integer number (96176700).

Almost surely, 2^384665623 is an apocalyptic number.

384665623 is a deficient number, since it is larger than the sum of its proper divisors (41177).

384665623 is a wasteful number, since it uses less digits than its factorization.

384665623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41176.

The product of its digits is 622080, while the sum is 43.

The square root of 384665623 is about 19612.8943045130. The cubic root of 384665623 is about 727.2679659788.

The spelling of 384665623 in words is "three hundred eighty-four million, six hundred sixty-five thousand, six hundred twenty-three".