173169161 has 4 divisors (see below), whose sum is σ = 188911824. Its totient is φ = 157426500.

The previous prime is 173169137. The next prime is 173169187. The reversal of 173169161 is 161961371.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-173169161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (173163161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7871315 + ... + 7871336.

It is an arithmetic number, because the mean of its divisors is an integer number (47227956).

Almost surely, 2^173169161 is an apocalyptic number.

173169161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

173169161 is a deficient number, since it is larger than the sum of its proper divisors (15742663).

173169161 is a wasteful number, since it uses less digits than its factorization.

173169161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15742662.

The product of its digits is 6804, while the sum is 35.

The square root of 173169161 is about 13159.3754031109. The cubic root of 173169161 is about 557.3870199444.

The spelling of 173169161 in words is "one hundred seventy-three million, one hundred sixty-nine thousand, one hundred sixty-one".