4389239 has 4 divisors (see below), whose sum is σ = 4397424. Its totient is φ = 4381056.

The previous prime is 4389233. The next prime is 4389241. The reversal of 4389239 is 9329834.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9329834 = 2 ⋅4664917.

It is a cyclic number.

It is not a de Polignac number, because 4389239 - 2⁴ = 4389223 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 (4389233) 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, 3227 + ... + 4380.

It is an arithmetic number, because the mean of its divisors is an integer number (1099356).

Almost surely, 2^4389239 is an apocalyptic number.

4389239 is a deficient number, since it is larger than the sum of its proper divisors (8185).

4389239 is an equidigital number, since it uses as much as digits as its factorization.

4389239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8184.

The product of its digits is 46656, while the sum is 38.

The square root of 4389239 is about 2095.0510733631. The cubic root of 4389239 is about 163.7305584595.

The spelling of 4389239 in words is "four million, three hundred eighty-nine thousand, two hundred thirty-nine".