169609 has 8 divisors (see below), whose sum is σ = 196128. Its totient is φ = 144960.

The previous prime is 169607. The next prime is 169627. The reversal of 169609 is 906961.

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

It is a cyclic number.

It is not a de Polignac number, because 169609 - 2¹ = 169607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (169607) 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, 267 + ... + 640.

It is an arithmetic number, because the mean of its divisors is an integer number (24516).

2¹⁶⁹⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

169609 is a deficient number, since it is larger than the sum of its proper divisors (26519).

169609 is a wasteful number, since it uses less digits than its factorization.

169609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 169609 is about 411.8361324605. The cubic root of 169609 is about 55.3540792517.

The spelling of 169609 in words is "one hundred sixty-nine thousand, six hundred nine".