8245172647 has 2 divisors, whose sum is σ = 8245172648. Its totient is φ = 8245172646.

The previous prime is 8245172609. The next prime is 8245172657. The reversal of 8245172647 is 7462715428.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8245172647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8245172597 and 8245172606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8245172657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4122586323 + 4122586324.

It is an arithmetic number, because the mean of its divisors is an integer number (4122586324).

Almost surely, 2^8245172647 is an apocalyptic number.

8245172647 is a deficient number, since it is larger than the sum of its proper divisors (1).

8245172647 is an equidigital number, since it uses as much as digits as its factorization.

8245172647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 752640, while the sum is 46.

The square root of 8245172647 is about 90802.9330308223. The cubic root of 8245172647 is about 2020.2258224646.

The spelling of 8245172647 in words is "eight billion, two hundred forty-five million, one hundred seventy-two thousand, six hundred forty-seven".