384688399 has 4 divisors (see below), whose sum is σ = 385164720. Its totient is φ = 384212080.

The previous prime is 384688397. The next prime is 384688429. The reversal of 384688399 is 993886483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993886483 = 7213 ⋅137791.

It is a cyclic number.

It is not a de Polignac number, because 384688399 - 2¹ = 384688397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384688397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236947 + ... + 238564.

It is an arithmetic number, because the mean of its divisors is an integer number (96291180).

Almost surely, 2^384688399 is an apocalyptic number.

384688399 is a deficient number, since it is larger than the sum of its proper divisors (476321).

384688399 is an equidigital number, since it uses as much as digits as its factorization.

384688399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476320.

The product of its digits is 8957952, while the sum is 58.

The square root of 384688399 is about 19613.4749343404. The cubic root of 384688399 is about 727.2823195084.

The spelling of 384688399 in words is "three hundred eighty-four million, six hundred eighty-eight thousand, three hundred ninety-nine".