170869009 has 4 divisors (see below), whose sum is σ = 170928100. Its totient is φ = 170809920.

The previous prime is 170869007. The next prime is 170869031. The reversal of 170869009 is 900968071.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70308225 + 100560784 = 8385^2 + 10028^2 .

It is a cyclic number.

It is not a de Polignac number, because 170869009 - 2¹ = 170869007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170869007) 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 in 3 ways as a sum of consecutive naturals, for example, 24972 + ... + 31069.

It is an arithmetic number, because the mean of its divisors is an integer number (42732025).

Almost surely, 2^170869009 is an apocalyptic number.

It is an amenable number.

170869009 is a deficient number, since it is larger than the sum of its proper divisors (59091).

170869009 is an equidigital number, since it uses as much as digits as its factorization.

170869009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59090.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 170869009 is about 13071.6873050115. The cubic root of 170869009 is about 554.9081459328.

The spelling of 170869009 in words is "one hundred seventy million, eight hundred sixty-nine thousand, nine".