169604 has 12 divisors (see below), whose sum is σ = 300300. Its totient is φ = 83808.

The previous prime is 169591. The next prime is 169607. The reversal of 169604 is 406961.

It can be written as a sum of positive squares in 2 ways, for example, as 78400 + 91204 = 280^2 + 302^2 .

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 169604.

It is not an unprimeable number, because it can be changed into a prime (169607) by changing a digit.

169604 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242 + ... + 630.

It is an arithmetic number, because the mean of its divisors is an integer number (25025).

2¹⁶⁹⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

169604 is a deficient number, since it is larger than the sum of its proper divisors (130696).

169604 is a wasteful number, since it uses less digits than its factorization.

169604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 169604 is about 411.8300620402. The cubic root of 169604 is about 55.3535353082.

It can be divided in two parts, 16 and 9604, that multiplied together give a square (153664 = 392²).

The spelling of 169604 in words is "one hundred sixty-nine thousand, six hundred four".