384775509 has 16 divisors (see below), whose sum is σ = 535435200. Its totient is φ = 245473536.

The previous prime is 384775499. The next prime is 384775519. The reversal of 384775509 is 905577483.

It is an interprime number because it is at equal distance from previous prime (384775499) and next prime (384775519).

It is not a de Polignac number, because 384775509 - 2⁷ = 384775381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384775519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9739 + ... + 29400.

It is an arithmetic number, because the mean of its divisors is an integer number (33464700).

Almost surely, 2^384775509 is an apocalyptic number.

It is an amenable number.

384775509 is a deficient number, since it is larger than the sum of its proper divisors (150659691).

384775509 is a wasteful number, since it uses less digits than its factorization.

384775509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39284.

The product of its (nonzero) digits is 1058400, while the sum is 48.

The square root of 384775509 is about 19615.6954758173. The cubic root of 384775509 is about 727.3372113652.

The spelling of 384775509 in words is "three hundred eighty-four million, seven hundred seventy-five thousand, five hundred nine".