169445 has 4 divisors (see below), whose sum is σ = 203340. Its totient is φ = 135552.

The previous prime is 169427. The next prime is 169457. The reversal of 169445 is 544961.

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 119716 + 49729 = 346^2 + 223^2 .

It is a cyclic number.

It is not a de Polignac number, because 169445 - 2¹² = 165349 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16940 + ... + 16949.

It is an arithmetic number, because the mean of its divisors is an integer number (50835).

2¹⁶⁹⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

169445 is a deficient number, since it is larger than the sum of its proper divisors (33895).

169445 is an equidigital number, since it uses as much as digits as its factorization.

169445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33894.

The product of its digits is 4320, while the sum is 29.

The square root of 169445 is about 411.6369759873. The cubic root of 169445 is about 55.3362323282.

The spelling of 169445 in words is "one hundred sixty-nine thousand, four hundred forty-five".