169564085 has 4 divisors (see below), whose sum is σ = 203476908. Its totient is φ = 135651264.

The previous prime is 169564067. The next prime is 169564121. The reversal of 169564085 is 580465961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 580465961 = 1237 ⋅469253.

It can be written as a sum of positive squares in 2 ways, for example, as 34586161 + 134977924 = 5881^2 + 11618^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-169564085 is a prime.

It is a Duffinian number.

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, 16956404 + ... + 16956413.

It is an arithmetic number, because the mean of its divisors is an integer number (50869227).

Almost surely, 2^169564085 is an apocalyptic number.

It is an amenable number.

169564085 is a deficient number, since it is larger than the sum of its proper divisors (33912823).

169564085 is an equidigital number, since it uses as much as digits as its factorization.

169564085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33912822.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 169564085 is about 13021.6775033019. The cubic root of 169564085 is about 553.4919262428.

The spelling of 169564085 in words is "one hundred sixty-nine million, five hundred sixty-four thousand, eighty-five".