17040809 has 2 divisors, whose sum is σ = 17040810. Its totient is φ = 17040808.

The previous prime is 17040799. The next prime is 17040839. The reversal of 17040809 is 90804071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16933225 + 107584 = 4115^2 + 328^2 .

It is an emirp because it is prime and its reverse (90804071) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17040809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (17040839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8520404 + 8520405.

It is an arithmetic number, because the mean of its divisors is an integer number (8520405).

Almost surely, 2^17040809 is an apocalyptic number.

It is an amenable number.

17040809 is a deficient number, since it is larger than the sum of its proper divisors (1).

17040809 is an equidigital number, since it uses as much as digits as its factorization.

17040809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 17040809 is about 4128.0514773922. The cubic root of 17040809 is about 257.3337425532. Note that the first 3 decimals are identical.

The spelling of 17040809 in words is "seventeen million, forty thousand, eight hundred nine".