173432609 has 12 divisors (see below), whose sum is σ = 204020100. Its totient is φ = 146982528.

The previous prime is 173432593. The next prime is 173432617. The reversal of 173432609 is 906234371.

173432609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 28302400 + 145130209 = 5320^2 + 12047^2 .

It is not a de Polignac number, because 173432609 - 2⁴ = 173432593 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 (173432629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15524 + ... + 24245.

It is an arithmetic number, because the mean of its divisors is an integer number (17001675).

Almost surely, 2^173432609 is an apocalyptic number.

It is an amenable number.

173432609 is a deficient number, since it is larger than the sum of its proper divisors (30587491).

173432609 is an equidigital number, since it uses as much as digits as its factorization.

173432609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39872 (or 39865 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 173432609 is about 13169.3814964865. The cubic root of 173432609 is about 557.6695338597.

It can be divided in two parts, 1734 and 32609, that added together give a palindrome (34343).

The spelling of 173432609 in words is "one hundred seventy-three million, four hundred thirty-two thousand, six hundred nine".