384673409 has 4 divisors (see below), whose sum is σ = 385138260. Its totient is φ = 384208560.

The previous prime is 384673403. The next prime is 384673463. The reversal of 384673409 is 904376483.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 904376483 = 41 ⋅22057963.

It can be written as a sum of positive squares in 2 ways, for example, as 185722384 + 198951025 = 13628^2 + 14105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-384673409 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 384673409.

It is not an unprimeable number, because it can be changed into a prime (384673403) 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, 231182 + ... + 232839.

It is an arithmetic number, because the mean of its divisors is an integer number (96284565).

Almost surely, 2^384673409 is an apocalyptic number.

It is an amenable number.

384673409 is a deficient number, since it is larger than the sum of its proper divisors (464851).

384673409 is an equidigital number, since it uses as much as digits as its factorization.

384673409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464850.

The product of its (nonzero) digits is 435456, while the sum is 44.

The square root of 384673409 is about 19613.0927953752. The cubic root of 384673409 is about 727.2728728120.

The spelling of 384673409 in words is "three hundred eighty-four million, six hundred seventy-three thousand, four hundred nine".