8245172609 has 2 divisors, whose sum is σ = 8245172610. Its totient is φ = 8245172608.

The previous prime is 8245172581. The next prime is 8245172647. The reversal of 8245172609 is 9062715428.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6777899584 + 1467273025 = 82328^2 + 38305^2 .

It is a cyclic number.

It is not a de Polignac number, because 8245172609 - 2¹² = 8245168513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8245172609.

It is not a weakly prime, because it can be changed into another prime (8245172699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4122586304 + 4122586305.

It is an arithmetic number, because the mean of its divisors is an integer number (4122586305).

Almost surely, 2^8245172609 is an apocalyptic number.

It is an amenable number.

8245172609 is a deficient number, since it is larger than the sum of its proper divisors (1).

8245172609 is an equidigital number, since it uses as much as digits as its factorization.

8245172609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 8245172609 is about 90802.9328215780. The cubic root of 8245172609 is about 2020.2258193611.

The spelling of 8245172609 in words is "eight billion, two hundred forty-five million, one hundred seventy-two thousand, six hundred nine".