384207689 has 4 divisors (see below), whose sum is σ = 397456260. Its totient is φ = 370959120.

The previous prime is 384207643. The next prime is 384207713. The reversal of 384207689 is 986702483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 986702483 = 13 ⋅75900191.

It can be written as a sum of positive squares in 2 ways, for example, as 301543225 + 82664464 = 17365^2 + 9092^2 .

It is a cyclic number.

It is not a de Polignac number, because 384207689 - 2²⁰ = 383159113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384207619) 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, 6624242 + ... + 6624299.

It is an arithmetic number, because the mean of its divisors is an integer number (99364065).

Almost surely, 2^384207689 is an apocalyptic number.

It is an amenable number.

384207689 is a deficient number, since it is larger than the sum of its proper divisors (13248571).

384207689 is a wasteful number, since it uses less digits than its factorization.

384207689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13248570.

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 384207689 is about 19601.2165183695. The cubic root of 384207689 is about 726.9792537788.

The spelling of 384207689 in words is "three hundred eighty-four million, two hundred seven thousand, six hundred eighty-nine".