4391845439 has 2 divisors, whose sum is σ = 4391845440. Its totient is φ = 4391845438.

The previous prime is 4391845427. The next prime is 4391845489. The reversal of 4391845439 is 9345481934.

It is an a-pointer prime, because the next prime (4391845489) can be obtained adding 4391845439 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4391845439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4391845489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2195922719 + 2195922720.

It is an arithmetic number, because the mean of its divisors is an integer number (2195922720).

Almost surely, 2^4391845439 is an apocalyptic number.

4391845439 is a deficient number, since it is larger than the sum of its proper divisors (1).

4391845439 is an equidigital number, since it uses as much as digits as its factorization.

4391845439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 50.

The square root of 4391845439 is about 66270.9999849104. Note that the first 4 decimals coincide. The cubic root of 4391845439 is about 1637.6296113556.

The spelling of 4391845439 in words is "four billion, three hundred ninety-one million, eight hundred forty-five thousand, four hundred thirty-nine".