8226509 has 2 divisors, whose sum is σ = 8226510. Its totient is φ = 8226508.

The previous prime is 8226503. The next prime is 8226529. The reversal of 8226509 is 9056228.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7038409 + 1188100 = 2653^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 8226509 - 2¹² = 8222413 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8226503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4113254 + 4113255.

It is an arithmetic number, because the mean of its divisors is an integer number (4113255).

Almost surely, 2^8226509 is an apocalyptic number.

It is an amenable number.

8226509 is a deficient number, since it is larger than the sum of its proper divisors (1).

8226509 is an equidigital number, since it uses as much as digits as its factorization.

8226509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 8226509 is about 2868.1891499690. The cubic root of 8226509 is about 201.8700353426.

The spelling of 8226509 in words is "eight million, two hundred twenty-six thousand, five hundred nine".