170409 has 8 divisors (see below), whose sum is σ = 232672. Its totient is φ = 110880.

The previous prime is 170393. The next prime is 170413. The reversal of 170409 is 904071.

170409 is nontrivially palindromic in base 6.

170409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 170409 - 2⁴ = 170393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 170409.

It is not an unprimeable number, because it can be changed into a prime (170509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532 + ... + 789.

It is an arithmetic number, because the mean of its divisors is an integer number (29084).

2¹⁷⁰⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

170409 is a deficient number, since it is larger than the sum of its proper divisors (62263).

170409 is a wasteful number, since it uses less digits than its factorization.

170409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 170409 is about 412.8062499527. The cubic root of 170409 is about 55.4409728741.

The spelling of 170409 in words is "one hundred seventy thousand, four hundred nine".