170087009 has 2 divisors, whose sum is σ = 170087010. Its totient is φ = 170087008.

The previous prime is 170086999. The next prime is 170087011. The reversal of 170087009 is 900780071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124389409 + 45697600 = 11153^2 + 6760^2 .

It is a cyclic number.

It is not a de Polignac number, because 170087009 - 2¹⁶ = 170021473 is a prime.

It is a Sophie Germain prime.

Together with 170087011, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (170087089) 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, 85043504 + 85043505.

It is an arithmetic number, because the mean of its divisors is an integer number (85043505).

Almost surely, 2^170087009 is an apocalyptic number.

It is an amenable number.

170087009 is a deficient number, since it is larger than the sum of its proper divisors (1).

170087009 is an equidigital number, since it uses as much as digits as its factorization.

170087009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 170087009 is about 13041.7410264121. The cubic root of 170087009 is about 554.0603193846.

The spelling of 170087009 in words is "one hundred seventy million, eighty-seven thousand, nine".