17242009 has 2 divisors, whose sum is σ = 17242010. Its totient is φ = 17242008.

The previous prime is 17242007. The next prime is 17242033. The reversal of 17242009 is 90024271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10497600 + 6744409 = 3240^2 + 2597^2 .

It is a cyclic number.

It is not a de Polignac number, because 17242009 - 2¹ = 17242007 is a prime.

Together with 17242007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (17242007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8621004 + 8621005.

It is an arithmetic number, because the mean of its divisors is an integer number (8621005).

Almost surely, 2^17242009 is an apocalyptic number.

It is an amenable number.

17242009 is a deficient number, since it is larger than the sum of its proper divisors (1).

17242009 is an equidigital number, since it uses as much as digits as its factorization.

17242009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 17242009 is about 4152.3498166701. The cubic root of 17242009 is about 258.3425582091.

The spelling of 17242009 in words is "seventeen million, two hundred forty-two thousand, nine".