8509069 has 2 divisors, whose sum is σ = 8509070. Its totient is φ = 8509068.

The previous prime is 8509063. The next prime is 8509079. The reversal of 8509069 is 9609058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6959044 + 1550025 = 2638^2 + 1245^2 .

It is a cyclic number.

It is not a de Polignac number, because 8509069 - 2⁵ = 8509037 is a prime.

It is a super-2 number, since 2×8509069² = 144808510493522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8509063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4254534 + 4254535.

It is an arithmetic number, because the mean of its divisors is an integer number (4254535).

Almost surely, 2^8509069 is an apocalyptic number.

It is an amenable number.

8509069 is a deficient number, since it is larger than the sum of its proper divisors (1).

8509069 is an equidigital number, since it uses as much as digits as its factorization.

8509069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 8509069 is about 2917.0308534536. The cubic root of 8509069 is about 204.1553107294.

The spelling of 8509069 in words is "eight million, five hundred nine thousand, sixty-nine".