169289 has 4 divisors (see below), whose sum is σ = 173460. Its totient is φ = 165120.

The previous prime is 169283. The next prime is 169307. The reversal of 169289 is 982961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 982961 = 7 ⋅140423.

It can be written as a sum of positive squares in 2 ways, for example, as 43264 + 126025 = 208^2 + 355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (169283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2024 + ... + 2105.

It is an arithmetic number, because the mean of its divisors is an integer number (43365).

2¹⁶⁹²⁸⁹ is an apocalyptic number.

It is an amenable number.

169289 is a deficient number, since it is larger than the sum of its proper divisors (4171).

169289 is an equidigital number, since it uses as much as digits as its factorization.

169289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170.

The product of its digits is 7776, while the sum is 35.

The square root of 169289 is about 411.4474450036. The cubic root of 169289 is about 55.3192452965.

It can be divided in two parts, 169 and 289, that multiplied together give a square (48841 = 221²).

The spelling of 169289 in words is "one hundred sixty-nine thousand, two hundred eighty-nine".