164416909 has 4 divisors (see below), whose sum is σ = 166264380. Its totient is φ = 162569440.

The previous prime is 164416883. The next prime is 164416913. The reversal of 164416909 is 909614461.

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 32741284 + 131675625 = 5722^2 + 11475^2 .

It is a cyclic number.

It is not a de Polignac number, because 164416909 - 2²⁵ = 130862477 is a prime.

It is a super-3 number, since 3×164416909³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164417909) 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, 923602 + ... + 923779.

It is an arithmetic number, because the mean of its divisors is an integer number (41566095).

Almost surely, 2^164416909 is an apocalyptic number.

It is an amenable number.

164416909 is a deficient number, since it is larger than the sum of its proper divisors (1847471).

164416909 is an equidigital number, since it uses as much as digits as its factorization.

164416909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1847470.

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

The square root of 164416909 is about 12822.5157048061. The cubic root of 164416909 is about 547.8338035182.

The spelling of 164416909 in words is "one hundred sixty-four million, four hundred sixteen thousand, nine hundred nine".