4391239 has 4 divisors (see below), whose sum is σ = 4396824. Its totient is φ = 4385656.

The previous prime is 4391227. The next prime is 4391249. The reversal of 4391239 is 9321934.

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 4391239 - 2¹¹ = 4389191 is a prime.

It is a d-powerful number, because it can be written as 4¹¹ + 3⁵ + 9 + 1 + 2¹⁷ + 3¹⁰ + 9⁴ .

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 4391239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4391249) 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, 1372 + ... + 3265.

It is an arithmetic number, because the mean of its divisors is an integer number (1099206).

Almost surely, 2^4391239 is an apocalyptic number.

4391239 is a deficient number, since it is larger than the sum of its proper divisors (5585).

4391239 is an equidigital number, since it uses as much as digits as its factorization.

4391239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5584.

The product of its digits is 5832, while the sum is 31.

The square root of 4391239 is about 2095.5283343348. The cubic root of 4391239 is about 163.7554231640.

The spelling of 4391239 in words is "four million, three hundred ninety-one thousand, two hundred thirty-nine".