170813009 has 4 divisors (see below), whose sum is σ = 171012720. Its totient is φ = 170613300.

The previous prime is 170812997. The next prime is 170813029. The reversal of 170813009 is 900318071.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 900318071 = 4987 ⋅180533.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-170813009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170813029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98567 + ... + 100284.

It is an arithmetic number, because the mean of its divisors is an integer number (42753180).

Almost surely, 2^170813009 is an apocalyptic number.

It is an amenable number.

170813009 is a deficient number, since it is larger than the sum of its proper divisors (199711).

170813009 is an equidigital number, since it uses as much as digits as its factorization.

170813009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199710.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 170813009 is about 13069.5450953734. The cubic root of 170813009 is about 554.8475181031.

The spelling of 170813009 in words is "one hundred seventy million, eight hundred thirteen thousand, nine".