169428085 has 4 divisors (see below), whose sum is σ = 203313708. Its totient is φ = 135542464.

The previous prime is 169428053. The next prime is 169428089. The reversal of 169428085 is 580824961.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 580824961 = 3137 ⋅185153.

It can be written as a sum of positive squares in 2 ways, for example, as 88679889 + 80748196 = 9417^2 + 8986^2 .

It is a cyclic number.

It is not a de Polignac number, because 169428085 - 2⁵ = 169428053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169428089) 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, 16942804 + ... + 16942813.

It is an arithmetic number, because the mean of its divisors is an integer number (50828427).

Almost surely, 2^169428085 is an apocalyptic number.

It is an amenable number.

169428085 is a deficient number, since it is larger than the sum of its proper divisors (33885623).

169428085 is an equidigital number, since it uses as much as digits as its factorization.

169428085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33885622.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 169428085 is about 13016.4543943426. The cubic root of 169428085 is about 553.3439093719.

The spelling of 169428085 in words is "one hundred sixty-nine million, four hundred twenty-eight thousand, eighty-five".