389299243 has 4 divisors (see below), whose sum is σ = 390850488. Its totient is φ = 387748000.

The previous prime is 389299199. The next prime is 389299247. The reversal of 389299243 is 342992983.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 389299243 - 2²⁵ = 355744811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389299247) 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, 775246 + ... + 775747.

It is an arithmetic number, because the mean of its divisors is an integer number (97712622).

Almost surely, 2^389299243 is an apocalyptic number.

389299243 is a deficient number, since it is larger than the sum of its proper divisors (1551245).

389299243 is a wasteful number, since it uses less digits than its factorization.

389299243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1551244.

The product of its digits is 839808, while the sum is 49.

The square root of 389299243 is about 19730.6675761364. The cubic root of 389299243 is about 730.1765026390.

The spelling of 389299243 in words is "three hundred eighty-nine million, two hundred ninety-nine thousand, two hundred forty-three".