8319517447 has 2 divisors, whose sum is σ = 8319517448. Its totient is φ = 8319517446.

The previous prime is 8319517433. The next prime is 8319517463. The reversal of 8319517447 is 7447159138.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8319517447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8319517447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8319512447) 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, 4159758723 + 4159758724.

It is an arithmetic number, because the mean of its divisors is an integer number (4159758724).

Almost surely, 2^8319517447 is an apocalyptic number.

8319517447 is a deficient number, since it is larger than the sum of its proper divisors (1).

8319517447 is an equidigital number, since it uses as much as digits as its factorization.

8319517447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 49.

The square root of 8319517447 is about 91211.3888009606. The cubic root of 8319517447 is about 2026.2796319543.

The spelling of 8319517447 in words is "eight billion, three hundred nineteen million, five hundred seventeen thousand, four hundred forty-seven".