8309439989747 has 24 divisors (see below), whose sum is σ = 9172162421424. Its totient is φ = 7521757186944.

The previous prime is 8309439989717. The next prime is 8309439989759. The reversal of 8309439989747 is 7479899349038.

It is not a de Polignac number, because 8309439989747 - 2¹⁶ = 8309439924211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8309439989717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17709293 + ... + 18172449.

It is an arithmetic number, because the mean of its divisors is an integer number (382173434226).

Almost surely, 2^{8309439989747} is an apocalyptic number.

8309439989747 is a deficient number, since it is larger than the sum of its proper divisors (862722431677).

8309439989747 is a wasteful number, since it uses less digits than its factorization.

8309439989747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465239 (or 465226 counting only the distinct ones).

The product of its (nonzero) digits is 2962842624, while the sum is 80.

The spelling of 8309439989747 in words is "eight trillion, three hundred nine billion, four hundred thirty-nine million, nine hundred eighty-nine thousand, seven hundred forty-seven".