8245207109 has 2 divisors, whose sum is σ = 8245207110. Its totient is φ = 8245207108.

The previous prime is 8245207081. The next prime is 8245207193. The reversal of 8245207109 is 9017025428.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6174502084 + 2070705025 = 78578^2 + 45505^2 .

It is a cyclic number.

It is not a de Polignac number, because 8245207109 - 2¹⁶ = 8245141573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8245207199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4122603554 + 4122603555.

It is an arithmetic number, because the mean of its divisors is an integer number (4122603555).

Almost surely, 2^8245207109 is an apocalyptic number.

It is an amenable number.

8245207109 is a deficient number, since it is larger than the sum of its proper divisors (1).

8245207109 is an equidigital number, since it uses as much as digits as its factorization.

8245207109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 8245207109 is about 90803.1227932168. The cubic root of 8245207109 is about 2020.2286370782.

The spelling of 8245207109 in words is "eight billion, two hundred forty-five million, two hundred seven thousand, one hundred nine".