164904169 has 4 divisors (see below), whose sum is σ = 165741444. Its totient is φ = 164066896.

The previous prime is 164904163. The next prime is 164904191. The reversal of 164904169 is 961409461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 162690025 + 2214144 = 12755^2 + 1488^2 .

It is a cyclic number.

It is not a de Polignac number, because 164904169 - 2³ = 164904161 is a prime.

It is a super-2 number, since 2×164904169² = 54386769907161122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164904161) 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, 418342 + ... + 418735.

It is an arithmetic number, because the mean of its divisors is an integer number (41435361).

Almost surely, 2^164904169 is an apocalyptic number.

It is an amenable number.

164904169 is a deficient number, since it is larger than the sum of its proper divisors (837275).

164904169 is an equidigital number, since it uses as much as digits as its factorization.

164904169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837274.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 164904169 is about 12841.5018202701. The cubic root of 164904169 is about 548.3744499327.

The spelling of 164904169 in words is "one hundred sixty-four million, nine hundred four thousand, one hundred sixty-nine".