4391304389 has 2 divisors, whose sum is σ = 4391304390. Its totient is φ = 4391304388.

The previous prime is 4391304383. The next prime is 4391304397. The reversal of 4391304389 is 9834031934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4295753764 + 95550625 = 65542^2 + 9775^2 .

It is a cyclic number.

It is not a de Polignac number, because 4391304389 - 2⁴ = 4391304373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4391304383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2195652194 + 2195652195.

It is an arithmetic number, because the mean of its divisors is an integer number (2195652195).

Almost surely, 2^4391304389 is an apocalyptic number.

It is an amenable number.

4391304389 is a deficient number, since it is larger than the sum of its proper divisors (1).

4391304389 is an equidigital number, since it uses as much as digits as its factorization.

4391304389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 4391304389 is about 66266.9177569019. The cubic root of 4391304389 is about 1637.5623597564.

The spelling of 4391304389 in words is "four billion, three hundred ninety-one million, three hundred four thousand, three hundred eighty-nine".