164170209 has 16 divisors (see below), whose sum is σ = 250373120. Its totient is φ = 93733200.

The previous prime is 164170199. The next prime is 164170229. The reversal of 164170209 is 902071461.

It is a happy number.

It is not a de Polignac number, because 164170209 - 2⁷ = 164170081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (164170229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30684 + ... + 35634.

It is an arithmetic number, because the mean of its divisors is an integer number (15648320).

Almost surely, 2^164170209 is an apocalyptic number.

It is an amenable number.

164170209 is a deficient number, since it is larger than the sum of its proper divisors (86202911).

164170209 is a wasteful number, since it uses less digits than its factorization.

164170209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6540.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 164170209 is about 12812.8922964333. The cubic root of 164170209 is about 547.5596665650.

The spelling of 164170209 in words is "one hundred sixty-four million, one hundred seventy thousand, two hundred nine".