8309448997 has 2 divisors, whose sum is σ = 8309448998. Its totient is φ = 8309448996.

The previous prime is 8309448949. The next prime is 8309449007. The reversal of 8309448997 is 7998449038.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7473429601 + 836019396 = 86449^2 + 28914^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8309448997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8309443997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4154724498 + 4154724499.

It is an arithmetic number, because the mean of its divisors is an integer number (4154724499).

Almost surely, 2^8309448997 is an apocalyptic number.

It is an amenable number.

8309448997 is a deficient number, since it is larger than the sum of its proper divisors (1).

8309448997 is an equidigital number, since it uses as much as digits as its factorization.

8309448997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15676416, while the sum is 61.

The square root of 8309448997 is about 91156.1791487555. The cubic root of 8309448997 is about 2025.4618869777.

The spelling of 8309448997 in words is "eight billion, three hundred nine million, four hundred forty-eight thousand, nine hundred ninety-seven".